Pick up low- or no-sodium canned tomatoes; regular canned varieties can contain a surprising amount of added salt that you won’t miss. Use on pizzas or stirred into pasta.
Preheat oven to 425°F. Drain 1 (28-oz.) can unsalted whole tomatoes. Halve tomatoes; place on a foil-lined baking sheet coated with cooking spray. Top with garlic cloves, fresh thyme leaves, fresh oregano leaves, and crushed red pepper. Drizzle with 2 Tbsp. olive oil. Roast 30 minutes. Cool 10 minutes. Transfer to blender; blend until smooth. Stir in kosher salt.