Mayo Clinic | Koc University Hospital

Ingredients

• 1/2 cup chopped onion
• 8 ounces chopped mushrooms
• 1 egg
• 2 egg whites
• 1/2 cup fat-free sour cream
• 3 ounces lean ham, chopped (about 1 1/4 cups)
• 6 ounces shredded low-fat Swiss cheese
• 1 ready-made 9-inch pie crust