Ratatouille Baked Eggs

Name: Ratatouille Baked Eggs
Ingredients: One 24-ounce jar prepared tomato sauce; 1 tablespoon dried oregano; 2 cups Ratatouille Grilled Vegetables, recipe follows; 4 large eggs; 2 tablespoons chopped fresh flat-leaf parsley; Grated Parmesan, for garnish; Grilled bread, for serving; 1 medium zucchini, thinly sliced lengthwise; 1 medium yellow squash, thinly sliced lengthwise; 1 red bell pepper, seeded and quartered; 1/2 small red onion, thinly sliced; 1 tablespoon extra-virgin olive oil; Kosher salt and freshly ground black pepper