Caviar-Artichoke Mound

4 14 oz cans artichoke hearts, drained
2 oz packages cream cheese, softened
1/4 c sour cream
2 T may
1/2 to 1 C finely chopped onion
2 2-oz jars black caviar, drained
Chop artichokes, drain well on paper towels. Shape into a mound in the center of serving dish. Combine cream cheese, sour cream, mayo, onion, and beat at med. speed 1 minute. Spread over artichokes, flattening the top slightly. Spoon caviar on top. Serve with crackers.