Stir in 3 Tbsp soy sauce, 1 tsp brown sugar, 2 tsp Worcestershire sauce, 1 can diced tomatoes, and pepper to taste.

Step 4: Combine and Cook (Phase 1)
Add 1 cup chopped onions and the browned beef to the crockpot. Mix well. Cook on HIGH for 3 hours or LOW for 6–7 hours.

Step 5: Add Peppers and Finish Cooking (Phase 2)
Add the 2 sliced bell peppers. Cook for an additional hour on the same setting before serving.