01 - If using meat, brown the ground beef or sausage in a skillet over medium heat. Drain any excess fat.
02 - Add the cooked meat (if using), cubed processed cheese, cream cheese, and the entire can of Rotel diced tomatoes with green chilies (including juices) to the slow cooker.
03 - Sprinkle in the garlic powder and black pepper, distributing evenly over the ingredients.
04 - Cover and cook on low heat for 2 hours, stirring occasionally, until the cheeses are fully melted and the dip is smooth and creamy throughout.
05 - Keep warm in the crockpot and serve with tortilla chips, crackers, or fresh vegetables for dipping.