Meal Prep Option: Cook the egg and spinach mixture up to 2 days ahead. Store it in an airtight container in the fridge. In the morning, toast your English muffin, reheat the egg in the microwave for 30 seconds, and assemble with fresh avocado and tomato.
Freezing: The assembled sandwich doesn’t freeze well due to the avocado and tomato, but you can freeze the cooked egg portions. Wrap them individually in plastic wrap, then foil. Thaw overnight in the fridge and reheat before assembling.
