Joy Bauer's Veggie-and-Cheese Frittata Recipe

Ingredients

• 6 whole large eggs
• 6 large egg whites
• 1/2 cup light sour cream
• 1/4 teaspoon kosher salt
• 1/4 teaspoon ground black pepper
• 2 to 4 tablespoons minced fresh herbs (any preferred including parsley, dill, chives, thyme, etc.)
• 1 medium yellow onion, finely diced (about 1½ cups)
• 1 large red bell pepper, finely chopped (about 1½ cups)
• 1 cup finely chopped mushrooms (optional)
• 3/4-1 cup 2% reduced-fat shredded sharp cheddar cheese (or any preferred cheese, like feta), divided