Omlette

Dice the onion, peppers, and kielbasa

Fry the onion in oil for a couple minutes then add the peppers

When the peppers/onion look well fried, add the kielbasa

Crack the eggs, beat them, and pour on top

When the egg is firm on the bottom and there's just a bit of liquid left on top, attempt to flip the egg. (This is usually the trickiest part!)

Put the cheese slices on one half of the egg

Let the bottom cook a couple minutes longer, then fold the egg in half over the cheese, and let the cheese melt before serving.