Gently combine all ingredients in a bowl with a spoon. Salt and pepper to taste.
If adding avocado, place the chunks on top.
Serve with tortilla chips, or over rice and beans, or a Mexican dish.

4 medium tomatoes, diced
1/4 medium red onion, diced
2 garlic cloves, minced
1 handful fresh cilantro, chopped
1/2 lime or lemon, juice of
salt and pepper to taste
optional:
1 jalapeno or chili pepper, diced
1 ripe avocado, chunks