Ingredients
Scale
- 4 tbs butter
- 1 cup white onion, chopped thin
- 1 cup baby bella mushrooms, sliced
- 3 tbs flour
- 2 cups whole milk
- 6 red potatoes, spiralized
- 2 cups Gruyère cheese
- 1/2 cup grated parmesan cheese
- sea salt and pepper
Instructions
- Preheat oven to 400 degrees
- Heat 1 tbs of butter over medium heat in a cast iron skillet
- When butter is melted, add mushrooms and onions, season with sea salt and pepper
- Cook for 5 minutes until mushrooms and onions soften, set aside
- Melt remaining 3 tbs of butter over low heat until frothy
- Whisk in flour, slowly until fully combined
- Slowly whisk in milk until mixture is smooth, season with sea salt and pepper, set aside
- Layer the spiralized potatoes in the skillet
- Top with mushrooms and onions
- Sprinkle with Gruyère
- Pour milk mixture on top of cheese
- Sprinkle with parmesan
- Cover with foil, bake for 55 minutes
- Remove foil, broil for 5-10 minutes until cheese is golden brown
- Let rest 5 minutes before serving