adapted from the 2000 Betty Crocker Cookbook
Mash all ingredients together. Cover surface of guacamole with plastic wrap to help prevent browning if serving later.
I only had one jalapeno, which I minced. I didn't feel like cutting up onion to put in it, and it sounded like it and the tomatoes really were there to make the guacamole interesting. I didn't have fresh cilantro, so I used some frozen cubes of it I'd bought at Trader Joe's.