Preheat oven to 400°. On a large baking sheet, toss jalapeños, cherry tomatoes, and onion together with oil. Season with ½ teaspoon salt and pepper. Roast until slightly charred, 20 minutes.
In a food processor, add roasted vegetables, quartered tomatoes, garlic, cilantro, lime juice, cumin, and a pinch of red pepper flakes. Season with remaining 1¼ teaspoons salt and pepper, then pulse a few times until mostly blended and slightly chunky.
Recipe by 5* trending recipes with videos at https://food.theffeed.com/2021/05/17/homemade-salsa/