Sweet Potato Gratins and Beet Gratins

I waxed euphoric over the individual potato gratins.  Please, allow me to add sweet potatoes and beets to that list.  This is a recipe that has so many possibilities.

Here's a link to the original post:  Individual Potato Gratins. 

Basically, you slice red potatoes VERY thinly and layer them in muffin tins with salt, pepper, garlic and a bit of finely grated cheese.  Then, you top them with a tablespoon of cream and bake them.  They're beyond wonderful.  We've now had them at least four times...  Connie asks for them and he's not a huge fan of potatoes. 

Once we tried the individual potato gratins, Connie and I brainstormed.  Basic ingredients, liquid, cheese, seasonings...  Two of our top choices were beets and sweet potatoes.  Now, the problem with both of them is that they aren't typically a size that can be easily mandolined and fit into a muffin tin.  So, when we tried these I had a choice between cutting rounds that would fit and wasting a good bit of potato or beet OR cutting pieces and filling the muffin tins.  My Scotch heritage won out.  Go figure.  They still tasted fantastic.  They just didn't stand beautifully on their own once they were taken out of the muffin tins. 

How did we make them?  In both cases, we used blue cheese with cream.  I added some chopped walnuts to the beet gratins:

My guess is these will be great with a lower calorie option like chicken stock or a mix of chicken stock and some white wine.  I'm also dreaming up different combinations.  Like greek lemon potatoes.  Or, mediterranean with some kalamata olives.  I just bought a new bag of red potatoes so a remix is on the menu!