Finely chop tomatoes, onion and peppers by hand (or use food processor and plus - just do not puree or will have runny salsa) and put into a bowlSqueeze in one lime (to add juice)Add salt (usually 1 - 2 tsp can be enough)Add sugar (and cumin if desired)Allow to sit for at least 1 hour before servingStore up to 1 week in a covered container/jar in the refrigerator