Baked Onions Au Gratin - cooking recipe

Ingredients

6 -9 white onions or 6 -9 yellow onions, sliced 1/4-inch thick
2 tablespoons butter
1/2 cup heavy whipping cream
1/4 cup dry white wine
1/8 teaspoon black pepper
1/4 cup parmesan cheese, grated
1 1/2 cups swiss cheese, shredded

Preparation

Saute onions in butter.
Place onions in a 9 x 13 casserole dish with a slotted spoon.
Stir in heavy whipping cream, white wine, and black pepper. Mix well.
Top with cheeses.
Bake at 375 degrees for 15-20 minutes.