Try this leeks vinaigrette recipe. leeks are cooler than onions. they perform the same jobs (use them anywhere you would a regular cooking onion) but theyre sweeter, with a more delicate flavor. plus, theyre pretty give em a whirl with this tasty recipe for leeks vinaigrette. try these tasty leeks with grilled tri tip steak, st. louis-style steak or savory grilled t-bones. leeks are allium vegetables that are closely related to onions, garlic, shallots, and scallions. with a milder flavor and larger size, they work well added to everything from salads to soups, where they add beneficial fiber and bulk along with vitamins, minerals, and antioxidant polyphenols. read more >>.