Step 1

Pre-heat oven to 400F.

Step 2

Slice bell peppers into strips and onion into half rings.

Step 3

Heat 1 T olive oil in large frying pan over medium-high heat. When oil is hot, add bell peppers and onions. Sautee until soft and beginning to brown, about 8 minutes.

Step 4

In the meantime, peel and slice potatoes into 1/4 inch slices.

Step 5

When bell pepper and onion are done, add spinach to pan one handful at a time until it wilts.

Step 6

Use the remaining 1 t olive oil to coat a deep casserole dish. Assemble the gratin:

Step 7

Lay a layer of potatoes in the bottom of the dish.

Step 8

Spread a layer of vegetables on top.

Step 9

Repeat until the vegetables and potatoes are used, ending with potatoes.

Step 10

Mix creme fraiche through chives together for sauce. Pour over top of casserole. Sprinkle with Parmesan.

Step 11

Bake 20 minutes, until top is golden brown and sides are bubbling.