Whole grains and whole-grain pastas add nutritional balance and heartiness to soups. Quinoa takes 15 to 20 minutes to cook and delivers 3 grams of fiber per 1/2-cup serving. Quick-cooking barley, which cooks in 10 to 12 minutes, is technically not a whole grain, but it counts toward your whole-grain servings because of its high fiber content. Fresh or frozen whole-wheat ravioli cooks in minutes and turns a light vegetable soup into a satisfying main course. Look for whole-wheat ravioli in the refrigerated or frozen section of the supermarket. Whole-grain elbow macaroni and penne are also quick-cooking and provide a boost of fiber.