HEAT oil in large nonstick skillet on high heat. Add steak; cook until browned, stirring frequently.
ADD salsa, water, peppers and beans; mix well. Bring to boil. Reduce heat to medium-low; simmer 10 min. or until steak is tender, stirring occasionally.
SPOON steak mixture evenly onto lettuce leaves; top with cheese. Roll up. Serve warm.