Can you 'perk-up' frozen leftovers?

I have made macaroni salad out of left over macaroni and cheese. Just add some salad dressing or mayonnaise and some pickle relish or anything else you would put in a macaroni salad. The cheese adds to the flavor.

Hi, While I've never frozen mac and cheese, I'd add a bit of seasoned ground beef or ground turkey meat like you would fix for tacos and some salsa. Stir it all up & reheat in a casserole dish. Maybe serve a green salad with it. Also, something else you could mix with the macaroni and cheese & serve a different way: 1-2 cans (6 ozs.) tuna (drained), 1 can cream of mushroom soup, some sauteed onion, 1 can mushroom pieces (optional), 1 can of green peas (drained), a sprinkle or 2 of oregano (optional).

Chuck in a can of spaghetti sauce & some fried & drained ground beef & or turkey or sausage.
Or just add some more different cheeses & a bit more milk & margarine.