Prep vegetables: cut tomatoes (if using fresh) and onion into 1 inch chunks, to assist the food processor. Smash and remove paper from garlic cloves, and core/deseed the jalapeño.
Add tomatoes, onion, garlic, cilantro, jalapeño, and lime juice to food processor and blend until smooth.
Sample the salsa. Add more jalapeño/jalepeño core (see Honi's note in the post)**, cilantro, or lime juice as desired and blend again. Add salt to taste.
Serve with your favorite tortilla chips.