Place bacon in single layer in shallow pan. Bake 5 minutes. (Bacon will only be partially cooked. Do not cook until crisp.) Remove bacon from pan; drain on paper towels
Cut deep lengthwise slit in each wiener, stopping 1/2 inch from both ends and being careful to not cut all the way through to bottom of wiener
Insert 2 Singles strips into each slit. Wrap 1 bacon slice tightly around each wiener; secure with wooden toothpicks
Grill 5 to 6 minutes or until bacon is crisp and wieners are heated through, turning occasionally and adding buns, cut sides down, to the grill for the last few minutes to grill until lightly toasted
Remove and discard toothpicks from wieners. Place wieners in buns; top with ketchup and mustard