4largeSweet onionssliced thin, 1015 Onions are recommended
Combine Bisquick mix and milk. Line the bottom and sides of a deep casserole dish with dough. Saute onions in oil until they turn a golden color. Spread the onions along the bottom of crust. Mix eggs, milk and flour. Pour evenly over onions. Bake at 400 degrees for 35 minutes, or until the crust is brown. Remove from oven. Let pie set for 10 minutes. Pour chicken broth over top of pie. Return to oven and bake 10 more minutes. Serve hot. Can be made ahead, refrigerated and warmed in the microwave.