Peel sweet potato and cut it into smaller cubes. Chop the onions. Cut the peppers into strips. Clean mushrooms and cut them on halves. Chop chives.
Put 2 eggs in a bowl, salt them, pepper them, and add the chives and mix.
Set the oven to 200 degrees Celsius.Put olive oil in the pan (20 cm diameter pan) and quickly stir fry the onion, then add sweet potatoes and peppers. A little salt to soften the vegetables and stir it until sweet potatoes are almost cooked (taste to see), for about 13 minutes.
Then add the mushrooms and cook a couple of minutes. Add butter and stir.
Sprinkle roasted vegetables with grated cheese and allow it to melt, then pour over the egg mixture and cook over low heat for a minute or two before placing it in to the oven for up to 5 minutes to cook the top too. Make sure you serve it hot.