Prepare the measured ingredients. Choose the onion route and jalapeño heat level shown in the card. Keep the tomato chunks separate for now.
Put the onion, all 6 garlic cloves, cilantro, seeded jalapeño, lime juice, and sea salt in the food processor.
Pulse until the onion, garlic, cilantro, and jalapeño are evenly fine but not watery.
Add the tomato chunks.
Pulse briefly for chunky salsa or a little longer for a finer texture. Stop before the tomatoes become a uniform puree.
Taste for sea salt, transfer to a large glass bowl, and serve fresh.