In a large pot or skillet set over medium heat, brown ground beef and garlic. Drain grease, mix in salsa and taco seasoning, and then stir in black beans and corn. Simmer for 5 minutes, stirring occasionally, until mixture is thickened. Serve on hamburger buns or rolls.
If you prefer your Sloppy Joe meat with onions and peppers, you may dice up half an onion and half a bell pepper and cook them in a tablespoon of olive oil until softened (about 5 to 10 minutes) before browning the beef. Remove the onions and peppers from the pot and proceed with the recipe, cooking the meat and then stirring the onions/peppers back in at the same time you add the sauce.
Instead of buns, you may enjoy this sloppy joe mixture in tortillas or lettuce wraps, or eat it like chili.