Cook the peas in boiling salted water for about 2 minutes, rinse with cold water and drain. Clean and clean the mushrooms and cut them into slices. Quarter the peppers, clean, wash and cut into strips.
Peel and finely dice the onion and garlic. Cut the ham into strips. Whisk eggs, season with salt and pepper. Heat oil in a pan. Fry the bell peppers and mushrooms for about 2 minutes. Add ham, peas, onion and garlic, fry for about 2 minutes more.
Season with salt and pepper. Remove about 1/4 of the vegetable mixture from the pan. Pour eggs over the remaining vegetables. Cover and let it simmer for about 10 minutes at low heat. Add the remaining vegetables and warm up briefly.
Cut the omelette into pieces, sprinkle with pepper. Serve with a dash of sour cream.