3 cups thinly sliced onions
3 tablespoons butter, melted
1 (9-inch) pre-baked deep-dish pie shell
2 eggs, beaten
3 tablespoons all-purpose flour
1/2 cup milk
1 1/2 cups sour cream
1 teaspoon sea salt
4 slices bacon, crisply cooked and crumbled
1/2 cup shredded cheese (your choice, cheddar, white cheddar, Swiss etc. for garnish – OPTIONAL)
Sliced green onion for garnish (OPTIONAL)
Preheat oven to 325 degrees F.
Melt the butter In a medium saucepan over medium heat. Add the onions and saute until lightly browned.
Put the pie pan on a sheet pan. Line the bottom of pie crust with the onions.
Beat the eggs and the flour together in a small mixing bowl to combine. Add the milk, sour cream and salt. Mix well and pour over the onions. Garnish with the bacon, top lightly with shredded cheese (if using) and bake until firm in the center, about 30 minutes. Garnish top with sliced green onions if desired.