COOK pasta in large saucepan 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; stir. 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.