Peel and thinly slice onion, ... Saute onion and zucchini in butter until tender. Place ... Combine eggs, sour cream or yogurt, salt, pepper, mustard ... with remaining cheese. Bake at 375 degrees for 20 ... until firm. Serves 6.
Ingredients: 9 (cheese .. mustard .. onion .. salt .. yogurt .. zucchini ...)