Heat about a tablespoon of oil in a large pan over medium high heat. Add onion and saute until starting to caramelize, about 5-7 minutes.
Add ground meat to pan and break up with a spoon to crumble. {I like using a potato masher.} Sprinkle salt over meat and cook until browned and no longer pink.
Meanwhile, whisk together tomato sauce, tomato paste, Worcestershire sauce and garlic. Pour into meat and mix to coat meat. Cook for about 2 more minutes.
Pour in Coca-Cola, scraping up any brown bits at the bottom of the pan. Bring to a bubble and simmer until the sauce has reduced and thickened a bit.
Cool slightly, then assemble mini sloppy joes by sandwiching a scoop of meat mixture between two Ritz Crackers. Carefully skewer with a toothpick or create a DIY setup with diced tomatoes, shredded lettuce cheese and other toppings.