Purple Potato Gratin

Ingredients:

• 1 1/2 cups milk
• 1 tablespoon butter
• 2 tablespoons flour
• 2/3 cup grated cheddar cheese
• 2 lbs purple potatoes, unpeeled and sliced thinly
• 1 cup sliced onions
• 1 tablespoon olive oil
• 1/4 cup grated parmesan cheese
• 1/4 cup bread crumbs
• salt/pepper to taste
• chille flakes

Directions:

• To make the sauce put the butter into a small pan and melt.
• Add flour and stir to combine, cooking over medium heat for about 1 minute.
• Whisk in the milk and stir until thickened. Stir in cheese, when melted remove from heat add the chillie flakes,salt and pepper to taste.
• In a frying pan, add the olive oil and onions. Sautee until they are slightly brown and caramelized.
• Grease a gratin dish or shallow baking dish. Add half of the sliced potatoes to the dish. Sprinkle the onions over the potato layer. Add the remaining potato slices to the dish.
• Pour the gratin sauce over the top of the potatoes, spooning into any visible cracks and crevices.
• Mix the Parmesan cheese and bread crumbs and sprinkle all over.
• Place into a preheated 350 degree oven for 40 minutes.
• Eat with garlic bread