Mashed Yam and Potato Casserole

I have yams and russet potatoes uncooked and taking up too much space.

1 yam
2 russet potatoes

cut and boil

with hand mixer, mash the roots and add 2 tbsp butter, a generous handful of shredded cheese (i had colby jack on hand), about a 1/4 cup of heavy cream (still working through the literal GALLON of heavy cream in the fridge).  add garlic salt to taste.

Now I accidentally added some extra cream and it was a bit smoother than I prefer, so I decided to crown the thing a Casserole, topped it with the rest of our left-over stuffing and baked it on high for about 10 minutes to toast up the topping.

yum.