Prepare Oven: Begin by preheating your oven to 350°F (175°C) and lightly grease a muffin tin or use silicone liners to avoid any sticking.
Whisk the Eggs: In a large bowl add 6 eggs, 2 tablespoons of heavy cream, and beat them until smooth (a bit frothy). Salt and pepper, to taste.
Add Fillings: Mix in 1/2 cup shredded cheese, 1/2 cup chopped spinach, ¼ cup diced bell peppers, and ¼ cup cooked bacon or sausage. Mix well so that each muffin will taste the same.
Pour into Muffin Tin: Fill each muffin cup about ¾ full with the egg mixture, ensuring even distribution of veggies and protein.
Bake: Put the tin in the oven & bake for 18–20 minutes, or until the muffins are set and have a lovely golden top.
Cool & Serve: Let muffins cool for 5 minutes before removing. Serve hot or refrigerate and enjoy later.