Summer Cast-Iron Supper with Pork Tenderloin, Sausages, Sweet Potatoes and Garden Vegetables
Juicy sliced pork and browned sausages anchor a summer spread of sweet Japanese potatoes, husk-roasted corn and two very different vegetable sides. Garlicky beans and bursting tomatoes stay bright and crisp, while eggplant, zucchini and peppers turn soft and savory under a handful of fresh basil.
By Jonathan Katzman · Cooked and photographed · Recipe updated
Serves: 4 servings
Tags: gluten-free, nut-free

Cast-Iron Pork Tenderloin with Garlic and Parsley
A hot sear gives the lean pork a browned exterior, while a short oven finish keeps the center juicy. Garlic and parsley complement the vegetables without introducing a separate sauce.
Ingredients
- 1 lb pork tenderloin, silver skin removed
- 1 tbsp ghee
- 3 cloves garlic, lightly crushed
- 3/4 tsp kosher salt, plus more to taste
- 1/4 tsp freshly ground black pepper
- 2 tbsp roughly chopped flat-leaf parsley
Instructions
- Heat the oven to 425°F. Pat the pork dry, tuck the thin tail underneath and season with salt and pepper.
- Heat a cast-iron skillet over medium-high heat. Add the ghee and sear the pork for 5–7 minutes total, turning to brown all sides.
- Reduce the heat, add the garlic and roll it through the fat for 30 seconds. Transfer the skillet to the oven.
- Roast for 8–15 minutes, checking early, until the thickest part reaches 145°F.
- Rest on a board for 5 minutes, then slice across the grain into 1/2-inch medallions. Spoon over the rested juices and cooked garlic, and scatter with parsley.
Notes
- Temperature, rather than pinkness alone, determines doneness; pork should reach 145°F and rest at least 3 minutes.
Roasted Japanese Sweet Potatoes
Roasting whole preserves the red skins and concentrates the dense, chestnut-like sweetness of Japanese sweet potatoes.
Ingredients
- 4 small Japanese sweet potatoes, about 5–6 oz each
- 1 tsp olive oil
- 1/4 tsp kosher salt
Instructions
- Heat the oven to 425°F. Scrub and dry the potatoes, then prick each a few times with a fork.
- Rub lightly with olive oil and salt. Place on a lined baking sheet.
- Roast for 45–65 minutes, turning once, until a thin knife slips through the centers without resistance.
- Keep whole for serving, or split just before eating.
Notes
- Larger potatoes may need 75 minutes; start them before the other components.
Garlicky Green Beans, Snap Peas and Cherry Tomatoes
A brief blanch cooks the beans evenly before they meet the skillet. Tomatoes soften into a light coating while the snap peas retain their crunch.
Ingredients
- 10 oz green beans, trimmed
- 6 oz sugar snap peas, strings removed
- 10 oz mixed-color cherry tomatoes
- 1 tbsp ghee
- 3 cloves garlic, thickly sliced
- 2 tsp fresh lemon juice
- 2 tbsp flat-leaf parsley leaves
- to taste kosher salt and black pepper
Instructions
- Bring a pot of salted water to a boil. Blanch the green beans for 3 minutes, then drain and dry thoroughly.
- Heat the ghee in a wide skillet over medium-high heat. Add the green beans and cook for 2 minutes, letting a few spots brown.
- Add the snap peas and tomatoes. Cook for 3–4 minutes, tossing occasionally, until the peas are crisp-tender and some tomatoes begin to split.
- Lower the heat, add the garlic and cook for 1–2 minutes without letting it burn.
- Remove from the heat. Add lemon juice, salt, pepper and parsley, tossing gently so most tomatoes remain whole.
Cast-Iron Sausages
A short covered steam cooks the sausages through gently; browning afterward produces taut, golden skins without splitting them.
Ingredients
- 4 fresh mild Italian pork sausages, about 3–4 oz each, certified gluten-free
- 1 tsp ghee
- 1/3 cup water
Instructions
- Place the sausages and water in a skillet. Bring to a gentle simmer over medium heat, cover and cook for 7–9 minutes, turning once.
- Uncover and let the remaining water evaporate. Add the ghee and brown the sausages over medium heat for 6–10 minutes, turning regularly.
- Check that the centers reach 160°F. Rest for 3 minutes before serving whole.
Notes
- Do not prick the casings; keeping them intact helps retain the juices.
Husk-Roasted Summer Corn
The husks trap steam around the kernels, keeping the corn juicy while their outer layers toast and char.
Ingredients
- 4 ears fresh sweet corn in the husk
- 2 tsp extra-virgin olive oil
- to taste flaky salt
Instructions
- Heat the oven to 425°F. Peel back the husks without detaching them, remove the silk and fold the husks back around the ears. Trim loose, dry ends.
- Place on a baking sheet and roast for 25–30 minutes, turning once, until the kernels are tender and the husks have browned.
- For darker husks, broil briefly on a foil-lined tray, turning frequently and watching continuously. Keep the husks well away from the heating element.
- Let stand for 3 minutes. Peel back the husks and finish the kernels with olive oil and salt.
Notes
- For a grill version, cook over medium heat for 20–25 minutes, turning frequently and moving away from flare-ups.
Roasted Summer Ratatouille with Basil
Roasting the vegetables in a roomy layer gives the eggplant and zucchini browned edges instead of a watery texture. Tomatoes bind everything into a light, chunky sauce.
Ingredients
- 1 small eggplant, about 12 oz, cut into 1-inch cubes
- 2 small zucchini, cut into thick half-moons
- 1 red bell pepper, cut into 1-inch pieces
- 1 small yellow onion, diced
- 12 oz ripe tomatoes, roughly chopped
- 3 cloves garlic, sliced
- 3 tbsp olive oil, divided
- 1 tsp kosher salt, divided, plus more to taste
- 1/4 tsp freshly ground black pepper
- 1 tsp red wine vinegar
- 1/3 cup loosely packed basil leaves, torn
Instructions
- Heat the oven to 425°F. Toss the eggplant, zucchini and bell pepper with 2 tablespoons olive oil and 1/2 teaspoon salt. Spread across a large sheet pan without crowding.
- Combine the onion, tomatoes, garlic, remaining olive oil, remaining salt and pepper in a shallow baking dish.
- Roast both dishes for 25–30 minutes, stirring once, until the vegetables have browned edges and the tomatoes are bubbling and softened.
- Fold the roasted vegetables into the tomato mixture. Return to the oven for 10–15 minutes, until the eggplant is completely tender but the pieces still hold their shape.
- Stir in the vinegar, adjust the salt and fold in most of the basil. Scatter the remaining basil over the top.
Notes
- If the tomatoes release a lot of liquid, roast the tomato mixture a little longer before combining it with the vegetables.
Overall Timing / Workflow
The long-roasting vegetables start first, leaving the final stretch for the meats and quick green vegetable sauté.
Instructions
- 0:00 — Heat the oven to 425°F and start the sweet potatoes.
- 0:10 — Prepare the ratatouille and put its two pans in the oven, leaving space for air circulation.
- 0:25 — Add the corn. Trim the green vegetables, blanch and dry the beans, and season the pork.
- 0:40 — Combine the ratatouille vegetables and tomato mixture for their final roast. Start the sausages on the stovetop.
- 0:45 — Sear the pork in a separate ovenproof skillet, then transfer it to the oven. Check the potatoes, corn and ratatouille and remove each as it becomes tender.
- 0:55 — Brown the sausages and cook the green bean mixture in another skillet. Remove the pork when it reaches 145°F and rest it.
- 1:05–1:20 — Finish the vegetables with herbs and acid, slice the pork and serve. Allow extra roasting time if the oven is crowded or the sweet potatoes are large.
Notes
- The ratatouille and sweet potatoes can wait loosely covered for 15–20 minutes; cook the green vegetables last.
Plating
Keeping the components in distinct groups preserves their textures and echoes the generous cast-iron presentation.
Instructions
- Use warm platters or clean, warm cast-iron skillets rather than pans that are still searing-hot.
- Fan the pork slices along one side of a platter, place the sweet potatoes through the middle and spoon the beans, peas and tomatoes alongside. Add the pork juices, garlic and parsley over the meat.
- Arrange the sausages on a second platter with the corn still partly wrapped in its toasted husks. Spoon the ratatouille beside them and finish with basil.
- Serve family-style, letting everyone take portions from both platters.
Leftover Path
Separate storage lets the pork reheat gently while the vegetables and sausages can take stronger heat.
Instructions
- Refrigerate leftovers in shallow, covered containers within 2 hours. Remove the corn husks before storing and keep the meats separate from the vegetables. Use within 3–4 days.
- Reheat pork slices covered with a splash of water or their juices over low heat. Reheat sausages, potatoes and vegetables separately; bring reheated leftovers to 165°F.
- For another meal, slice the sausages and cut the corn from the cobs, then warm them with the ratatouille. Serve with the remaining sweet potatoes.
- Use thinly sliced cold pork with the leftover green vegetables as a lunch salad, adding fresh lemon juice and olive oil.