My new favorite side dish

I don't blog on here very often about food.  I don't know why, but I don't.

BUT!

I found this recipe on Pinterest a few weeks ago and I.love.it.so.much.  I could eat the whole dish if I could.

I've made it twice.  The first time, with just whatever cheese I had one hand.  And I thought it was delicious.

But then I made it with the cheeses named in the recipe.  OH. MY. GOODNESS.  What I thought couldn't get better, DID GET BETTER.

Make this just like it says.  Brown those onions until they are crisp.

Upside Down Onion and Potato Tart


2 1/2 tablespoons butter


12 sprigs thyme, strip the leaves from the stems


1 large onion, sliced somewhat thickly ( a tad more than 1/4 inch thick)


1 lb. waxy red potatoes, washed and very thinly sliced

2 tablespoons olive oil


1/2 cup grated gruyère


1/2 cup crumbled feta


1 cup grated mozzarella


sea salt and cracked black pepper


Preheat oven to 400°. Melt the butter in a 9-10 inch ovenproof frying pan (cast iron is great) over medium heat. Add the thyme and onion and cook for 5 minutes. Place the potato, oil, cheeses, salt and pepper in a bowl and toss to combine.


Top the onion with the potato mixture and bake for 45 minutes or until golden brown and cooked through. Turn upside down to serve.