Cut the avocados in half, remove pit, scoop out flesh and put into a bowl.
Add remaining ingredients: onion, jalapenos, cilantro, garlic, salt, pepper, tomatoes, and lime juice.
Mash together with a fork to desired consistency. If you like it a little chunky, then just mash a little.
Stir to mix flavors together.
It tastes best when the flavors have a chance to mix together, so put in the fridge for awhile to cool and let the flavors mix.