COMBINE cheddar and 1/4 cup Parmesan. Cut three 2% Milk Singles in half. Cook pasta in large saucepan as directed on package.
MEANWHILE, cook chicken in large nonstick skillet 5 min. on each side or until done (165ºF). Top each breast with 1 Tbsp. marinara sauce, about 1-1/2 Tbsp. of the cheddar mixture and 1 Singles piece; cook 3 to 5 min. or until cheeses are melted. Remove from skillet; cover to keep warm.
DRAIN pasta; return to pan. Stir in remaining marinara sauce and Singles; cook and stir 3 min. or until sauce is heated through and Singles are melted. Spoon onto platter; top with chicken, remaining Parmesan and cilantro.