Seriously, it is. CakeWrecks even has a (mostly) family-friendly post to prove it.
I didn't know it was cleaning-the-fridge-day...had no idea there was such a thing...until Ponytails informed me of that fact while I was in the midst of arranging leftovers in a casserole dish. So I guess we were on target, if not with the cleaning, at least with the using up.
Tonight's menu was:
Pork-and-sausage casserole, made from leftover pork roast, two leftover sausages plus the brown rice they were cooked with, two or three chopped potatoes from with the pork roast, mushrooms, gravy plus a little milk, margarine, and paprika. Baked till the mushrooms were cooked through, but not long enough to dry out the rice.
Mini pita breads that the supermarket had for 99 cents a bag
Baked apples with a bit of apple butter, plus yogurt.