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