A wholly French soup and sandwich pairing is incomplete without bread and onion soup. Michel Roux has the definitely fastest way to make it with a Normandy spin—adding a splash of cider and a whole lot of subtlety. Get the recipe for Michel Roux's Onion Soup »Matt Taylor-Gross
Fried Mozzarella Sandwiches and Hearty Tomato Soup
This thick, porridgelike tomato soup is better to coat a fried mozzarella sandwich than the thinned versions normally served. A meal by itself, this hearty soup is also great way to start a morning. Get the recipe for Bread and Tomato Soup (Pappa al Pomodoro) »Zoe Schaeffer
Pressing down on this sandwich with a spatula while it toasts in the pan is the key to achieving the outer crispness and well-melted cheese that you want in a Reuben. Pile the meat on generously but not more than an inch or two thick or else the interior won't get sufficiently warmed.Matt Taylor-Gross
Chicken soup may or may not be a cure-all for physical and psychic ills, but if you add a few matzo balls it definitely becomes a deli classic. Light floaty dumplings in an equally light broth let the strong flavors of a Reuben sandwich really shine. Get the recipe for Aunt Gillie's Matzo Ball Soup »Laura Sant
Rustic Roman Braised Beef Sandwiches and Mushroom Onion Soup
Beloved throughout modern trattorias and osterias in Rome, this simple, rustic dish of shredded beef braised in tomatoes and onions make a great stew and a fantastic sandwich filling. Get the recipe for Braised Beef Sandwich »Matt Taylor-Gross
Rustic sandwiches need equally rustic soups. A variety of mushrooms gives nuance to this hearty vegetarian soup. Any assortment of fresh mushrooms will work and you can change those flavorful notes by switching up the combination each time you make it. Get the recipe Onion Fennel and Mushroom Soup »Farideh Sadeghin
The Ultimate Grilled Cheese and Smoked Tomato Combo
This specialty of Çesme, a small beach town in Turkey, is one of the world's great grilled cheese sandwiches, in which the cheese itself is grilled before getting slipped into toasted bread with raw tomato and optional (but highly recommended) toppings of griddled sausage and pickled cucumbers and chiles. Get the recipe for Turkish Grilled Cheese »Matt Taylor-Gross
In this twist on the classic comforting soup, tomatoes are smoked on the stove top before being reduced with red wine and puréed. The smokier taste to this soup compliments grilled sausage well in the ultimate grilled cheese sandwich—the Kumru. Get the recipe for Smoked Tomato Soup »James Roper
Although not strictly a sandwich, add a bit of jalapeño pickling liquid to the pork braise for these tacos, which tenderizes the meat and keeps it from drying out. Then have them with creamy tortilla soup. Get the recipe for Carnitas Tacos »Dylan + Jeni
This simple pasilla chile- and tomato-based soup is ladled onto tortilla chips and topped with creamy avocado, jack cheese, and tangy Mexican crema that adds a creamier texture to pickle-braised pork tacos. Get the recipe for Mexican Chicken Tortilla Soup (Sopa Azteca) »Farideh Sadeghin
Packed with green lentils, wheat berries, and black-eyed peas, this filling, tangy soup is brightened with handfuls of fresh parsley and mint. The yogurt helps to cut the richness of fatty pork belly gyros. Get the recipe for Chilled Yogurt and Chickpea Soup »Cem Talu
The briny, classic Manhattan-style chowder is made with two types of clams and plenty of tomato. Perfect for adding a briny helping to browned butter in lobster rolls. Get the recipe for Manhattan Clam Chowder »Matt Taylor-Gross
With roast pork, ham, Swiss cheese, and pickles, it's almost identical to a Cuban sandwich, save for the bread, a sweet egg load that's similar to challah. Get the recipe for Cuban Medianoche Sandwich »Farideh Sadeghin
This soup draws flavor from alcaparrado, a mix of pimento-stuffed olives and capers, and sweetness from raisins and along with the medianoche, makes a hearty Cuban-inspired meal.Andre Baranowski