With the motor of a clean and dry food processor running, drop whole garlic in through the top feed tube. The blade minces the garlic into tiny bits, as if you had minced it by hand. (see note about blender and garlic)
When the garlic pieces no longer hit the side of the work bowl, stop. Add the fresh or canned tomatoes, chiles, onion, salt, and cilantro. Pulse the on/off button for about 10 seconds. Do not over blend-- you want your salsa chunky!