HEAT barbecue to medium-high heat.
PLACE tomatoes, cut-sides up, in 8-inch square foil pan sprayed with cooking spray. Drizzle with dressing; top with cheeses. Place pan on barbecue grate.
GRILL 10 to 12 min. or until cheeses are melted and bottoms of tomatoes are browned.
SPRINKLE with basil.
serving size = 2 topped tomatoes (128 g)