Heart Frittatas

Preheat oven to 350°F. Coat a 9x9-in. pan with nonstick cooking spray. In a large bowl, lightly beat 8 eggs. Stir in ¾ cup finely chopped zucchini, ½ cup finely chopped fresh seeded tomato, ¼ cup crumbled cotija cheese, ¼ cup finely chopped red sweet pepper, ¼ tsp. salt, and ¼ tsp. black pepper. Pour egg mixture into prepared dish. Bake 30 minutes or until set (160°F when tested in the middle with an instant-read thermometer). Let cool 10 minutes. Using a 3½-in. heart-shaped cookie cutter, cut out shapes.