Green tomato salsa

Ingredients

• 1 pound green tomatoes


• 2 to 3 jalapeño or serrano peppers (more to taste)


• ½ medium onion, preferably a white onion, chopped, soaked for five minutes in cold water, drained, rinsed and drained again on paper towels


• Salt to taste


• ½ cup roughly chopped cilantro


• ¼ to ½ cup water, as needed (optional)