This easy baked ratatouille is one of my favorite family dinners for three simple reasons: it’s comforting and cheesy, it showcases tender seasonal vegetables, and it’s a crowd-pleaser. As temperatures cool, this hot, bubbling ground beef casserole is the perfect way to warm up.
The casserole is a colorful medley of ratatouille-inspired vegetables roasted until tender and finished with a melty cheese topping. It’s ideal at the end of summer when garden zucchini, summer squash, eggplant, and vine-ripened tomatoes are at their best. The bright tomatoes, tender squash, and silky eggplant roast into a rich, savory dish that highlights the season.
This recipe makes the most of summer produce while delivering a satisfying, nutritious meal for family dinners or gatherings.
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I adapted this baked ratatouille by adding a savory meat layer of ground beef. I cook the beef separately with onions, garlic, and tomato paste, then spread it into the casserole before arranging the vegetables. If you prefer a vegetarian version, skip the meat and keep the vegetable base.
Serve the finished casserole over pasta for a complete meal, or enjoy it on its own as a lower-carb, keto-friendly option.
Here’s how to assemble this simple, colorful, and healthy ground beef casserole:
Prep and Slice Vegetables for Baked Ratatouille
Gather vine-ripe tomatoes, zucchini, Japanese or regular eggplant, and yellow summer squash. Slice each vegetable into even rounds, about 1/4 inch thick. Uniform slices roast evenly and finish in the same amount of time.
Tip: If slices are too thick they can take much longer to cook. Aim for thin, consistent rounds so the casserole bakes through in the recommended time.
Sauté Onions & Brown Beef
- Prep: Slice onion and mince garlic. Place the sliced vegetables in separate bowls for easy layering.
- Cook onions: Sauté sliced onions in a skillet with olive oil over medium heat. Season with salt and pepper and add some minced garlic. Cook until the onions are translucent and just beginning to caramelize.
- Optional: A splash (about 1/4 cup) of dry red wine at this stage or while browning the meat enhances flavor.
- Add tomato paste: Stir in a small can of tomato paste and a little olive oil, cooking until the paste is fragrant and coats the onions, about 5–8 minutes. Remove this mixture from the heat and spread it in the bottom of your casserole dish.
Layer Ground Beef & Onions in Your Casserole Dish
Brown the meat: In the same skillet, add a bit more olive oil and brown 1 lb ground beef (or ground turkey) seasoned with salt, pepper, and a pinch of paprika. Cook about 15–20 minutes until browned and cooked through, adding a splash of red wine if using. Spoon the meat evenly over the onion and tomato paste layer in the casserole dish.
Layer Sliced Ratatouille Vegetables
Arrange the vegetables: Lay the sliced vegetables in a circular or alternating pattern over the meat layer. This step is decorative but also helps the vegetables cook evenly. Sprinkle the top with remaining minced garlic, salt, and pepper, then drizzle generously with olive oil. Tuck a few fresh herbs into the center if desired, and cover tightly with foil.
Bake the Ratatouille Ground Beef Casserole
Bake at 400°F (200°C) covered for about 45 minutes to an hour, or until the vegetables are tender when pierced with a fork and the casserole is bubbling. Cooking time can vary slightly based on slice thickness and oven differences.
Top with Melty Cheese
Remove the foil and discard any whole herbs. Sprinkle 8 oz (or more to taste) of shredded melty cheese over the top—an Italian blend or mozzarella works well. Add a light sprinkle of grated Parmesan or Italian-style breadcrumbs for extra flavor and texture.
Finish Under the Broiler
Broil on high with the foil removed until the cheese is bubbly and lightly browned, 3–5 minutes. Watch closely—broilers brown very quickly.
Serve as a Keto Casserole or Over Pasta
This dish works well as a keto-friendly casserole on its own, or serve it over your favorite short pasta for a heartier meal. It’s a comforting main course that warms the family on cool days and makes great use of summer produce.
Enjoy this baked ratatouille with melty cheese as a wholesome, satisfying dinner. If you liked this, try other simple casseroles for using leftovers and seasonal vegetables.
Baked Ratatouille Recipe with Melty Cheese | Healthy Ground Beef Casserole
Pin Recipe
Ingredients
- 4 or 5 cloves Garlic – minced
- 1 medium Onion – sliced
- 3 to 4 vine ripe Tomatoes – mixed colors if available
- 1 can Tomato Paste
- 2 Zucchini – sliced rounds
- 2 Yellow Squash
- 2 Japanese Eggplant
- 1 lb Ground Beef – (optional; omit for vegetarian)
- 3 tbsp Olive Oil
- 1 tsp Coarse Sea Salt
- 1 tsp Ground Pepper
- 1/4 tsp Paprika – optional
- 8 oz Shredded Melty Cheese – your choice
- 2 or 3 tbsp Italian Style Bread Crumbs – for sprinkling over cheese
Instructions
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Preheat oven to 400°F (200°C). Mince garlic and slice the onion. Slice tomatoes, zucchini, eggplant, and yellow squash into 1/4 inch rounds and set aside.
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In a skillet over medium heat, warm 1–2 tbsp olive oil and sauté the sliced onion with salt and pepper. Add half the minced garlic and cook until the onions are translucent and slightly caramelized. Stir in the tomato paste until fragrant and well combined, then spread this mixture in an even layer on the bottom of the casserole dish.
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(Optional) In the same skillet, add more oil if needed and brown the ground beef with salt, pepper, paprika, and a splash of red wine. Cook until the meat is fully browned, about 15–20 minutes. Spoon the cooked meat over the onion and tomato layer and spread evenly.
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Arrange the sliced vegetables in an attractive pattern over the meat and onion base. Sprinkle with the remaining garlic, season with salt and pepper, and drizzle generously with olive oil. Cover tightly with foil.
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Bake covered for 45–60 minutes, until the vegetables are tender when pierced with a fork. Remove from the oven and take off the foil.
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Turn the broiler to high. Top the casserole with shredded cheese and, if desired, a sprinkle of grated Parmesan or Italian breadcrumbs. Broil 3–5 minutes until the cheese is bubbly and golden. Watch closely to avoid burning.
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Remove from the oven and serve the casserole on its own or over your favorite pasta. Enjoy warm.