Baked Orzo Ratatouille

Name: Baked Orzo Ratatouille
Ingredients: 1 yellow onion, diced; 1 small eggplant, diced; 1 zucchini, quartered and sliced; 1 yellow squash, quartered and sliced; 3 cloves garlic, minced; 1 15oz can diced tomatoes (I like to use fire-roasted for extra flavor); 2 tablespoons balsamic vinegar; 1/2 teaspoon crushed red pepper flakes; 1 pound orzo; ½ cup grated parmesan; ½ cup grated fontina cheese