BRING first 4 ingredients to boil in large saucepan, stirring occasionally. Simmer on medium-low heat 10 to 12 min. or just until pasta is tender, stirring occasionally.
STIR in half the spinach; cover. Simmer 2 min. or just until spinach is wilted. Repeat with remaining spinach.
SERVE topped with cheese.
serving size = 1-3/4 cups (425 mL)