Slice the stem off the jalapeno, then slice it in half. Use a spoon to scrape the inner rib and seeds off. Chop it into three pieces. You only need half a jalapeno for this recipe.
In a food processor, add 4 medium tomatoes (halved), 1 small red onion (chopped), 1 cup fresh cilantro, ½ jalapeño (seeds and ribs removed, then chopped), 1 Tbsp lime juice, 3 minced garlic cloves and ½ tsp salt.
Seal the food processor with the lid. Turn it on low until you reach a chunky but chopped consistency. Turn off and test the taste. Add more salt if needed. Scoop into a bowl to serve.