COOK pasta as directed on package.

MEANWHILE, crumble meat into large deep skillet; cook on medium-high heat 10 to 12 min. or until done, stirring occasionally. Drain, reserving meat in skillet. Add spinach and tomatoes; cook 2 min. or until spinach is wilted, stirring occasionally. Remove from heat; cover to keep warm.

DRAIN pasta; return to pan. Add meat mixture and cheeses; toss lightly.