Almost everyone agrees that chopped onion and chopped bell pepper cooked into the egg is more than perfect! But adding small cubes of ham in there too will increase taste, making it more delicious. How to Make A Denver Omelet? In a small bowl, whip the eggs lightly add some milk, grated cheese then salt and pepper. Melt butter in a large pan. Saute onion, bell pepper and ham in the butter until the onion starts to become translucent. Then mix the whipped eggs with the vegetables and bake them in the oven. A very easy and delicious recipe that everyone can do it! Enjoy cooking it!