Kosher salt
1 medium clove garlic
12-oz. jar roasted red peppers, drained and cut into 1/4-inch dice (about 1 cup)
1 cup small grape or cherry tomatoes, halved
1/2 cup chopped fresh flat-leaf parsley
4-1/2 Tbs. extra-virgin olive oil
1 Tbs. capers, rinsed and chopped
1/2 tsp. crushed red pepper flakes
1/2 cup coarse fresh breadcrumbs, preferably whole wheat
12 oz. dried linguine or spaghetti
1/2 cup freshly grated Parmigiano-Reggiano; more for serving