Ken’s Salsa Fresca!

1 Small Onion 1 Bunch Cilantro 1 Clove Garlic Jalapenos (from 1-? I use 4-6, non-hornists use 1 or 2…) 2 can’s Petite Diced Tomatoes (1 regular, 1 w/garlic and Olive Oil) or 5 fresh tomatoes 3Tbs Olive Oil 2Tbs White Vinegar 1-2