The Butterfly:
I froze the leftovers in small individual containers.
Heated some up, added a little Parmesan and fresh basil for my lunch today with a broccoli/tomato salad and a little leftover chicken which had been frozen as well.
(Last night I only added the basil and Parm at the end on our plated pasta.)
My leftover lemon parmesan pasta never tastes good. I generally keep all the ingredients separated and make a fresh batch if I end up making an extra serving. All the other types of pasta I keep as is but lemon+parm.