Combine all ingredients for meat loaf. Shape into a loaf and place in an 8 1/2x4 1/2 inch lightly greased loaf pan. Bake at 350 degrees F for 1 hour. Cool 10 minutes. Meanwhile, prepare sauce by melting butter in a small saucepan. Add green pepper and onion. Saute' 2-3 minutes. Remove from heat. Add mushrooms with liquid and tomato juice. Mix cornstarch, salt, and thyme with water; stir into pepper and onion mixture. Return pan to heat. Bring to boiling. Boil, stirring for 1 minute or until sauce clears and thickens. Slice meat loaf into 3/4 inch pieces. Spoon hot Creole Sauce over slices.