BROWN sausage in large skillet on medium-high heat 5 min.; drain.
STIR in tomatoes with their liquid, the water and Italian seasoning. Bring to boil. Add Shells. Reduce heat to medium-low; cover.
SIMMER 7 min., stirring twice. Add broccoli; cook an additional 5 min. or until tender. Stir in Cheese Sauce until well blended.