Mash 2 tablespoons cilantro, minced onion, ½ teaspoon salt, and jalapeño into a paste using a mortar and pestle.
¼ cup chopped fresh cilantro, 3 tablespoons minced white onion, ½-¾ teaspoon kosher salt, 1 fresh jalapeño pepper
If the mortar is large enough, add the avocado and lime juice to the cilantro paste and lightly mash together to desired consistency. (If the mortar is too small, transfer all ingredients to a bowl to mix.) Gently mix in reserved cilantro.
2 pounds avocados, 2-3 tablespoons freshly squeezed lime juice
Season to taste with more salt and/or lime juice.
Garnish with chopped tomatoes, if desired, and serve with chips.
Tortilla chips, Chopped fresh tomatoes