2 med. onions
4 to 5 lg. firm tomatoes
1/8 to 1/4 part of cilantro bunch (coriander), depending on taste
1 tbsp. olive or salad oil
1 tbsp. or more lime juice
Salt & pepper to taste
2 to 3 avocados, chopped (optional)

Chop onions and tomatoes; combine minced cilantro and add to mixture. Also add oil and lime juice. Salt and pepper to taste. Optional: Add avocado (chopped) right before serving (leave avocado seeds to prevent mixture from darkening).