Preheat the oven and prepare the pan

• Preheat the oven to 180 °C.
• Grease the muffin pan with the olive oil.

Mix the egg base

• Whisk the eggs with the milk, salt and black pepper in a mixing bowl until smooth.

Add the ham and cheese

• Stir the diced ham and grated cheddar into the egg mixture.

Fill the muffin cups

• Pour the mixture into the muffin cups, filling each about three-quarters full.

Bake the egg muffins

• Bake until the muffins are set and lightly golden.

Cool and serve

• Let the muffins cool slightly in the pan, then remove and serve.