Spinach Hash Brown Frittata - Master recipes

Ingredients

• 1 large onion, finely chopped -
• 1 tablespoon olive oil -
• 2 garlic cloves, minced -
• 1 package (10 ounces) frozen chopped spinach, thawed and squeezed dry -
• 1/4 teaspoon salt -
• 1/4 teaspoon pepper -
• 2 ounces pancetta or bacon strips, finely chopped -
• 3 cups frozen shredded hash brown potatoes, thawed -
• 8 large eggs, lightly beaten -
• 1 cup 2% milk -
• 1 cup fontina cheese, divided -
• 1 cup shredded cheddar cheese, divided -
• 1/4 cup minced fresh parsley -
• 1 tablespoon Worcestershire sauce -
• 1 teaspoon ground mustard -
• 1/4 teaspoon ground nutmeg -