1. In a medium pan over medium heat, add ground beef, onion powder, chili powder, salt and pepper.
  2. Brown the meat, continually breaking up and stirring until fully cooked.
  3. Assemble the lettuce wraps by layering a scoop of the beef, tomato, cheese, onion, and mustard on a large piece of lettuce and top with cooked bacon slices. Repeat with remaining ingredients.
  4. Serve immediately.