In a large skillet set over medium heat, add the ground beef, chopped onions, and minced garlic. Cook, stirring often, until the beef is browned and the onions are soft— about 5 minutes.
1 lb ground beef, 1 yellow onion, 1 clove garlic
Transfer the beef to your slow cooker (drain the grease if needed).
Add in the rest of the ingredients (beans, diced tomatoes, water, chili powder, cumin, oregano, and salt) and cook on high for 4 hours, or low for 6 hours.
2 cans (15 ounces) kidney beans, 2 cans (14 ounces) diced tomatoes , 1/2 cup water , 1 Tbsp chili powder, 1 tsp ground cumin, 1 tsp dried oregano , 1 tsp kosher salt
Serve warm, with garnishes of your choice. Store any leftover chili in an airtight container in the fridge for up to five days.