Baby Pizza

15 canape circles 1 jar (2-oz,) black caviar 1/4 tsp. lemon juice 1/4 tsp. minced onion 1 hard boiled egg, yolk and white grated separately Cut bread into 1/4-inch slices. Using a canape cutter cut into round pieces. Melt enough butter to cover bottom of skillet and saute bread on both sides; set aside. Combine…