Spinach-Potato Frittata

Ingredients

• 4 large eggs
• 2 large egg whites
• 1/3 cup 1% low-fat milk
• 1/2 teaspoon dried basil
• 1/4 teaspoon salt
• 1/8 teaspoon coarsely ground black pepper
• 2 cups diced potatoes with onion (such as Simply Potatoes)
• 1 (10-ounce) package frozen chopped spinach, thawed, drained, and squeezed dry
• 1 teaspoon butter
• Cooking spray
• 1/3 cup (1.3 ounces) shredded Asiago cheese
• 1 cup marinara sauce