Healthier Potato Spinach Cheesy Frittata - Sugar-Free Mom

Ingredients

• 1 Tablespoon canola oil
• 1 teaspoon minced garlic
• 1 cup chopped onion
• 3 cups red potatoes with skin, diced
• 3 cups fresh chopped spinach
• 6 eggs
• 1/2 cup egg whites
• 1/4 cup grated Parmesan cheese
• 1/4 cup shredded mozzarella, part skim
• 1/4 teaspoon salt
• 1/8 teaspoon pepper
• 2 tablespoons fresh chopped parsley
• optional: 6 ounces cooked ham, chopped