110 oz. can Ro*Tel diced tomatoes no salt addeddrained
Mash avocados with hand masher and then stir in, jalapeno, onion, lime juice, cilantro, salt, cumin until well mixed. Stir in tomatoes in at the end to prevent over crushing.
Serve immediately. Or using a skinny container to expose the least amount of guacamole, cover with plastic wrap so that the plastic is in contact and touching the entire top layer of the guacamole. Or add a layer of water and refrigerate for up to a day before serving.