Spray a 7x4 oven-safe pan well with cooking spray or grease well with butter.
In a large mixing bowl, whisk together 6 large eggs, ⅓ cup cream or milk, ½ teaspoon kosher salt⅛ teaspoon pepper, and ⅛ teaspoon grated nutmeg until well combined. Add up to 1 ½ cup fillings of choice, mixing to combine.
Pour the egg mixture into the prepared baking dish. Cover with foil.
Pour in 2 cups of cold water to the inner pot and place the cooking rack inside the inner pot of the Instant Pot. Carefully place the baking dish on the cooking rack. Close the Instant Pot and be sure the vent knob is sealed.
Set to High Pressure and cook for 6 minutes. (Press Manual or Pressure Cook and then use +/- buttons to adjust the time.)
Once the cook time has elapsed, let the pressure release naturally for 10 minutes, before doing a quick release of pressure. Remove the pan carefully from Instant Pot.
Serve warm or at room temperature.
Video
Notes
Eggs/Egg Whites: For this Instant Pot Frittata, use 6 whole eggs, 12 egg whites, or 1 ½ cups of refrigerated egg whites. For Milk/Cream: Use unflavored non dairy milk, regular milk ,half and half, or cream. Flavor Combinations:
Spinach and Feta: Add ¼ cup thinly sliced green onion, ⅓ cup frozen spinach, defrosted and squeezed dry, ½ cup grated Colby cheese, ¼ cup crumbled feta cheese, and 1 tablespoon grated Parmesan cheese.
Ham and Cheese: Decrease the salt to ¼ teaspoon, and fold in ½ cup shredded cheddar cheese and ½ cup diced ham to the egg mixture.
Vegetable: Add in ½ cup of sauteed or steamed vegetables of choice along with ¼ cup shredded cheese of choice. Mushrooms, peppers, asparagus, broccoli, zucchini, and onions are great additions.
Meat: Use cooked and crumbled breakfast sausage or Italian sausage, diced ham, or cooked and crumbled bacon.
3 Cheese: Add ½ cup cottage cheese, ½ cup shredded Swiss or fontina cheese, and ¼ cup grated parmesan.