3 large semi-soft but firm avocados
1/2 medium onion, diced
1 medium tomato, diced
1/4 cup chopped cilantro
1 finely chopped serrano pepper
Juice of 2 small limes
Tortilla chips (optional)
Combine ingredients in a bowl and mash until chunky. Use as a condiment with the fajitas and use the rest for dipping chips if desired.