01 - If using meat, heat a skillet over medium heat. Cook the ground beef or sausage, breaking it apart with a spoon, until fully browned throughout. Drain off any excess fat and set aside.
02 - Place the cubed processed cheese and the entire can of Rotel diced tomatoes with green chilies (including the liquid) into a large saucepan or slow cooker.
03 - Stir in the cooked meat if using, along with the garlic powder and onion powder. Mix gently to distribute the seasonings evenly throughout.
04 - Set the saucepan over medium-low heat and stir frequently for 8 to 10 minutes until the cheese is completely melted and the dip reaches a smooth, creamy consistency. If using a slow cooker, cover and cook on low for 1 to 2 hours, stirring occasionally.
05 - Transfer the hot dip to a serving bowl and serve immediately with tortilla chips, crackers, or fresh vegetable sticks. Keep warm in a slow cooker on the warm setting for gatherings.