In a bowl, combine the diced tomatoes, chopped onion, jalapeño, cilantro, and lime juice.
Add salt to taste, and mix well.
Set aside to let the flavors build.
Cut the avocados in half, remove the pits, and scoop the flesh into a bowl.
Use a fork to mash the avocados to your desired consistency (chunky or smooth).
Stir in the chopped onion, tomato, jalapeño, cilantro, and lime juice. Add salt and pepper to taste.
Mix until well combined.