Meanwhile place coarsely chopped garlic, cilantro, scallions, jalapeños, and serrano pepper in your food processor. Add oil and lime juice.
Now your tomatoes should be cooled enough to handle. Peel the skin off of each slice and discard the skins and add the roasted tomatoes to your food processor.
Pulse about 6-8 times until blended but still chunky. Stir in diced tomatoes with the juice. Then add salt and pepper. Stir again until well combined.
Cover and refrigerate for one hour in order for the flavors to slowly mingle and blend together.