Prepare Egg Mixture: In a bowl, crack the 6 eggs and add 1/4 cup grated Parmesan cheese, 1/4 cup heavy cream, a pinch of salt, and freshly ground black pepper. Beat until smooth and slightly frothy.

Preheat Oven: 2. Preheat your toaster oven to 365°F (185°C).

Prepare Muffin Tin: 3. Generously grease a 6-cup muffin tin with butter.

Prepare Bacon: 4. Place bacon strips on a microwavable tray, cover with a paper towel, and microwave for about 4 minutes. Drain excess fat and chop finely.

Prepare Fillings: 5. Chop green onions and cooked bacon. Place them on a plate with 1/3 cup shredded cheddar cheese.

Assemble Muffin Cups: 6. Evenly distribute cheddar cheese into each muffin cup. Add chopped bacon and green onions.

Add Egg Mixture: 7. Pour the egg mixture into each muffin cup, leaving a little room at the top.

Bake: 8. Bake in the preheated oven at 365°F (185°C) for about 20 minutes.

Serve: 9. Once baked, tuck in any overflow while still hot. Loosen edges of the muffins and remove from the tin. Serve warm.