easy ratatouille

My husband grew some beautiful tomatoes so I've been trying to incorporate a lot of fresh tomatoes into our meals.  I adapted this recipe to do so and it's delicious!  Even the kids didn't mind eating all these brilliant vegetables with their keilbasa sausage on the side, of course.

easy ratatouille (adapted from i heart nap time)
4 fresh tomatoes, diced into medium chunks
1/2 cup chopped onions
1/2 tablespoon minced garlic
1 teaspoon salt
1/2 teaspoon black pepper
2 zucchini, thinly sliced
1 summer squash, thinly sliced
1 red bell pepper, thinly sliced
1 tablespoon olive oil
dried thyme
parmesan cheese for sprinkling

Preheat the oven to 400 degrees.  Spread the tomatoes over the bottom of a 9x9 dish.  Stir in the onions, garlic, 1/2 teaspoon salt and 1/4 teaspoon pepper.  Layer the zucchini and yellow squash.  Fill the red pepper in the gaps.  Drizzle the olive oil on top.  Sprinkle thyme and remaining salt and pepper over top.
Bake covered with foil for 30 minutes.  Remove foil and bake an additional 10 minutes, or until vegetables are tender.  Top with parmesan cheese if desired.