Dice vegetables such as onion, bell pepper, and potato.
Crack the eggs into a bowl and season with salt and pepper.
Heat olive oil in a pan and sauté the potatoes first.
Add the other vegetables and ham, and stir-fry together.
Pour the beaten eggs over the cooked ingredients and cook on low heat.
Top with cheese, cover with a lid, and cook until nicely browned.
Cut the finished frittata into bite-sized pieces.