Prepare the skillet and bread

• Lightly grease a skillet with vegetable oil and heat over medium heat.
• Cut the toast bread diagonally to create triangles.
• Arrange the bread triangles in the skillet.

Beat the eggs

• Beat the eggs with salt until combined.

Pour the eggs and add the fillings

• Pour the egg mixture into the center of the skillet and let it spread around the bread.
• Sprinkle the grated mozzarella between the bread pieces on one side.
• Place the cheddar cheese slices over two bread triangles and top with the ham.

Cook covered

• Cover with a lid and cook until the egg mixture is mostly set.
• Remove the lid.

Fold into a sandwich

• Fold the omelet and bread in half using a spatula.
• Fold or cut in half once more to create triangular sandwich portions.
• Cook for another 30–60 seconds if desired.

Serve

• Transfer to a serving plate and serve hot.