Veggie Frittata with Sweet Onions, Tomatoes, Pesto, Spinach and Parmes

Ingredients

• ¼ of a medium-sized sweet onion (I’m in Oregon, so I use Walla Walla’s)
• 2-3 Tbs of olive oil
• 2 eggs
• 2 egg whites
• 2-3 TBS of pesto (homemade or store bought)
• 3 TBS of parmesan cheese
• Salt and pepper to taste
• A generous handful of raw, organic spinach
• A generous handful of whole, cherry tomatoes or one chopped tomato