Once ground beef is cooked, crumbled and drained, keep over low to medium heat and add the packet of taco seasoning. Stir well to blend in and let cook 3-4 minutes.
Place disposable Crockpot liner in the Crockpot, if using. If no liner is available, spray Crockpot with cooking spray.
Add ground beef mixture to the Crockpot.
Add remaining ingredients to the Crockpot and cook on HIGH 2 hours or on LOW 3-4 hours. Switch setting to WARM while serving.
NOTE: Check Crockpot occasionally and stir. If mixture seems too dry, add more Ro-Tel or 1/2 cup hot water or milk.