Adapted from a recipe from Whole Foods. Simple recipe, delicious results.
Ingredients:
1 tablespoon butter 1 tablespoon extra virgin olive oil 3 cloves garlic, finely chopped 1/2 yellow onion, finely chopped 3 medium russet, white, or yellow finn potatoes, thinly sliced Salt and pepper to taste 1 bunch spinach, stems removed, leaves coarsely chopped 1 cup grated Gruyere cheese
Preparation:
Preheat oven to 350 degrees. Heat butter and oil in a large oven-proof skillet over medium heat. Add garlic and onions and cook until onions are translucent, about 5 minutes. Spread out onions evenly in the bottom of the skillet and remove skillet from heat.
Arrange a third of the potatoes in a single layer on top of the onions in the bottom of the skillet, sprinkle with salt and pepper, top with a third of the spinach and scatter a third of the cheese over the top. Repeat the process to layer the ingredients two more times, ending with the cheese.
Cover skillet tightly with a lightly oiled piece of aluminum foil and bake until potatoes are easily pierced with the tip of a knife, about 1 1/4 hours. Gently remove foil then return skillet to the oven and bake until cheese is bubbling and browned on top, about 15 minutes more. Set aside to let rest briefly, then slice into wedges and serve.