Remove seeds and pulp from the tomatoes and cut into quarters. Remove seeds from the jalapenos (if desired) and chop. Roughly chop the onions and cilantro.
Place first tomatoes, jalapenos, onions and cilantro into a food processor. Pulse several times until the vegetables finely chopped and combined. If you prefer a chunkier salsa, you can forego the food processor and chop all the ingredients to your desired size.
Place the chopped ingredients into a small bowl and stir in juice from 1 lime. Add a couple pinches of salt. Taste and add more lime and salt as desired.
To make the Corn & Black Bean Salsa, stir in the corn and black beans and add more lime and salt to taste.
Serve with tortilla chips, on tacos, or over baked chicken or white fish.