SPREAD each bread slice with 1 tsp. of the barbecue sauce. Top 1 of the bread slices with Singles, bologna and tomatoes; cover with remaining bread slice, barbecue sauce down.
SPRAY skillet with cooking spray. Add sandwich; cook on medium heat 2 minutes on each side or until Singles is melted and sandwich is golden brown on both sides.
SERVE with remaining barbecue sauce for dipping.