Quiche Onion Tart
["1 (9-inch) pie crust", "1/2 c. butter", "6 c. chopped onions", "2 tsp. salt", "1 tsp. cumin", "3 eggs", "3/4 c. sour cream"]
["Saute onions in hot butter until golden brown.", "Remove from heat.", "Stir in salt and cumin."]
["crust", "butter", "onions", "salt", "cumin", "eggs", "sour cream"]