In a large non-stick skillet over medium-high heat, brown the lean ground beef with the diced onion for about 6–8 minutes until fully cooked. Add the minced garlic during the last minute.

Transfer the meat mixture to your slow cooker. Stir in crushed tomatoes, diced tomatoes, Worcestershire sauce, and chili seasoning.

Fold in both types of rinsed kidney beans until evenly mixed.

Cover the slow cooker with the lid and cook on low for 8–10 hours or high for 4–5 hours until flavors meld beautifully.

Serve hot with your favorite toppings like cheese, sour cream, or tortilla chips.