BRING water to boil in large deep skillet or saucepan on high heat. Stir in pasta. Reduce heat to medium-low; cover. Simmer 9 min. or just until pasta is tender and liquid is almost completely absorbed. (Do not drain.)
ADD soup, tuna, vegetables, thyme and dill; stir. Bring to boil. Reduce heat to low; simmer, uncovered, 3 to 5 min. or until thickened and heated through.
STIR in cheese.