Russ's Guacamole

2 mashed avocados 1 medium onion, finely chopped 1 jalapeno pepper, finely chopped 1 tablespoon lemon juice 1/2 tsp salt 1/2 tsp pepper 1 medium tomato, finely chopped 1 or 2 tsp mayonnaise

Mix everything up but the chopped tomato- adding that last.