Crustless Spinach Quiche

9 oz pkg. frozen chopped spinach, squeezed to drain
2 T. flour
3 eggs, lightly beaten
3/4 c. milk
1/4 c. mayo
1 c. sliced mushrooms
5 slices turkey bacon, cooked and crumbled (or 2 T. bacon bits)
1 c. grated cheddar cheese
1/2 c. grated swiss cheese
1/2c sliced green onions

Preheat oven to 350. Spray 9" pie pan with cooking spray. In a small bowl, toss spinach and flour until well mixed, set aside. In a large bowl, combine the eggs, milk and mayo. Stir in mushrooms, cheeses, spinach mixture, onions and bacon. Pour into pan, back for 1 hour. Let stand a few minutes before serving.