Mushroom Omelette with Creamy White Wine Sauce

yellow onion ((medium, peeled and chopped))

thinly sliced cremini mushrooms

butter

white wine

heavy cream

Salt and pepper ((to taste))

fresh chopped dill ((or other herbs))

eggs ((lightly beaten))

cremini mushroom ((thinly sliced))

fresh chopped dill ((or other herbs))

shredded Jack or Cheddar cheese

Salt and pepper ((to taste))

Fresh chopped dill ((or other herbs))

Fresh thinly sliced green onion

Thinly sliced chili pepper ((optional))