In a large non-stick skillet, brown the ground beef with the diced onion over medium-high heat. Break the meat into smaller pieces as it cooks, ensuring even browning. Once fully cooked, add the minced garlic and sauté for an additional minute.
Remove the meat and onion mixture from heat, draining off any excess grease if necessary. Transfer this mixture to the base of your slow cooker.
Incorporate the crushed tomatoes, diced tomatoes, Worcestershire Sauce, and chili seasoning into the slow cooker. Stir well to combine all ingredients.
Add both cans of beans after rinsing and draining them properly.
Place the lid on your slow cooker, setting it to cook on low for 8-10 hours or on high for about 4-5 hours.
Once done cooking, serve your Crockpot Chili hot with optional toppings like shredded cheese, sour cream, or warm cornbread.