Peel and devein the shrimp. If small, leave whole; if large, cut into bite-size pieces.
Melt the butter in a saucepan and stir in the cheese. Stir until cheese is melted. Add the cream and eggs, then the remaining ingredients except toast. Stir until mixture is thickened slightly and smooth. Stir in the shrimp and heat thoroughly. Serve over hot toast.