Prep: Preheat your oven to 375°F (190°C). Cube the potatoes, red onion, zucchini, eggplant, and tomatoes into bite-sized pieces. Keeping the cubes uniform in size will ensure they cook evenly and absorb the sauce's flavor effectively.
Make the Sauce: In a blender or food processor, combine the chopped tomatoes, minced garlic, olive oil, and fresh mint leaves. Blend until smooth. Season with salt and pepper to taste. This sauce is what will bring all the vegetables together, giving them a delicious, infused flavor.
Combine: In a large mixing bowl, combine all the cubed vegetables. Pour the prepared tomato sauce over the vegetables and toss everything together until the vegetables are well coated with the sauce.
Assemble: Transfer the coated vegetables into a large baking dish, spreading them out evenly.
Bake: Cover the baking dish with aluminum foil and bake in the preheated oven for about 45 minutes. This will allow the vegetables to cook and soak in the flavors of the sauce.
Remove foil: After 45 minutes, remove the foil and bake for an additional 30 minutes, or until the vegetables are tender and slightly caramelized on top.
Serving: Remove it from the oven and let it cool slightly before serving. Serve it as a hearty main dish or as a flavorful side to your favorite protein.