Dice onions, tomatoes, jalapenos, and cilantro as small as possible. Combine the rest of the ingredients. Chill overnight.

chop by hand. The jalapenos definitely are better when ground, as if you don't mince them fine enough, you have "hot spots" in the salsa. Three to four jalapenos make this a hot salsa. For mild, I would try adding one jalapeno pepper with the seeds removed. Let it sit overnight and taste. If too hot, add more chopped tomatoes and more cilantro. Definitely let it chill overnight; much better! Notes

It is truly delicious and always gets raves. You can also smoke the tomatoes before peeling which gives it a unique smokey flavor which complements certain foods.