Heat the oven to 375. Roast the garlic. Chop off the top of the whole garlic bulb to where you can see all the pieces of garlic peaking out. On the aluminum foil, put the bulb with the exposed part up and slightly drizzle the exposed garlic with olive oil. Cook for 15 min or until soft. Meanwhile, throw the tomatoes, onion, bell pepper, jalapeno, salt, and lime juice into a food processor. Pulse until very coarse. Don't over-process, you still have the garlic to put in.
When the garlic is squishy, squeeze ½ the bulb into the food processor.
Continue to pulse until desired consistency. If the color isn't right, add more whole tomatoes until perfect.
Note: if you need to use canned tomatoes as a substitute for fresh, consider cutting the salt in half or buy low sodium. Or, add salt to taste after blending. Second, (2) 28 oz. cans may be too much. Try 1 1/2 cans then add more if it's not enough tomato to your taste.
Note: don't use your time cutting nice pieces, the food processor will do all the work. You will need to cut it enough for it grab it and chop it well. F.e. I roughly chop the onion, you can even quarter that and the bell pepper. Jalapeno pepper I would chop well so there are no big chunks of jalapenos in the salsa.