Potato Frittata

Bahan-bahan (6 porsi)

• 2 strips thick-cut bacon (diced (see notes to make vegetarian))
• 2 medium Yukon gold potatoes (peeled and ½-inch diced (about 2 cups))
• 8 large eggs
• 3 tablespoons nonfat milk (or milk of choice)
• 1 teaspoon Dijon mustard
• 1/2 teaspoon kosher salt
• 1/4 teaspoon ground black pepper
• 1/3 cup shredded gruyere (sharp cheddar, or other similar, melty cheese)
• 1 cup roughly chopped fresh spinach
• ½ cup finely chopped green onions (about 3 medium)