Crabmeat Spinach Quiche

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1 (10 oz.) package frozen chopped spinach
2 eggs, lightly beaten
1 (8 oz.) container plain yogurt
1 tbsp. all-purpose flour
1 tsp. salt
1⁄4 tsp. pepper
1 can crabmeat
1 (4 1⁄2 oz.) can sliced mushrooms, drained
1 cup cheddar cheese, shredded
1 small onion, chopped
1 pie crust, uncooked

Cook spinach. Drain and squeeze out excess water. Beat eggs with yogurt, flour, salt, and pepper. Stir in spinach and crabmeat. Sprinkle mushrooms, cheese, and onion over crust. Pour in spinach mixture. Bake at 450 degrees for 15 minutes. Lower heat to 350 degrees and bake 30 minutes more.

(From the 2005 Farmers' Almanac)