The tomato-based condiment that Americans know and love actually originated in China as a fermented fish sauce. After making its way to Britain as a mushroom-based sauce and eventually to the United States, the addition of tomatoes made ketchup into the condiment we're familiar with today. Explore this selection of ketchup recipes for a range of ways to use this sweet and tangy sauce, including meatloaves, sandwiches, baked beans and, of course, hot dogs.