Preheat oven to 350°F.
Slice eggplant, zucchini, squash and bell pepper into 1/8" rounds. Add to a large bowl with minced garlic. Sprinkle with spices and seasonings. Drizzle with 1 tbsp olive oil. Toss and allow to sit for 5-10 minutes.
Preheat a large sautée pan with 1 tbsp olive oil. When pan is warm, add 1/3 of your vegetables. Tossing and flipping until slightly browned. Repeat with remaining olive oil and vegetables.
In individual dishes (or one large oven safe dish), spoon a thin layer of tomato sauce on the bottom. Arrange vegetable slices as desired. Bake for 10-15 minutes or until tender and sauce is bubbly.
Serve warm with bread or as a side dish to a larger meal.