12 oz ground turkey
1 medium onion, chopped
1/2 cup chopped mushrooms
1/4 teaspoon salt
1/4 teaspoon pepper
1 (15 oz) can tomato sauce
2 garlic cloves, minced
1 1/2 teaspoons dried oregano, divided
pinch red pepper flakes
1 1/2 cups part-skim ricotta cheese
1/2 teaspoon dried basil
24 wonton wrappers
1 1/2 cups shredded part-skim mozzarella cheese