Spinach, Mushroom and Swiss Crustless Quiche Squares

Course Appetizers

Ingredients in this Recipe

1 (16 ounce) bag frozen chopped spinach*, thawed and squeezed to remove as much liquid as possible
1 pound button mushrooms, thinly sliced
1 tablespoon extra virgin olive oil*, divided
1 teaspoon freshly grated nutmeg
11/2 cups shredded Swiss cheese*
2 cups (about 1 onion) thinly sliced yellow onion
3/4 cup reduced fat milk
3/4 teaspoon salt and 1/2 teaspoon freshly ground black pepper, divided
6 eggs
Natural cooking spray