Heat the olive oil in a skillet over medium heat. Add the ground beef and let it sit undisturbed for 30 seconds to brown, then break it into small pieces and cook until no pink remains.
1 Tbsp olive oil, 1 lb ground beef
Add the browned beef to the crockpot with the onion, kidney beans, black beans, cannellini beans, corn, Rotel, tomato sauce, taco seasoning, and beef broth. Stir to combine.
1 yellow onion, 15 oz kidney beans, 15 black beans, 15 cannellini beans, 15 corn, 20 oz Rotel diced tomatoes with green chilis, 15 oz tomato sauce, 1.31 oz taco seasoning, 4 cups low-sodium beef broth
Cover and cook on LOW for 6 - 8 hours or HIGH for 3 - 4 hours.
Switch the crockpot to keep warm. In a bowl, stir a few spoonfuls of hot broth into the Greek yogurt to temper it, then stir the yogurt into the chili until evenly distributed.
1 cup Greek yogurt
Serve topped with avocado, crushed tortilla chips, a dollop of Greek yogurt, Mexican cheese, and a squeeze of lime.
Avocado chunks, Crushed tortilla chips, Greek yogurt, Mexican cheese, Lime juice