Potato and Sweet Potato Tian

By taniaf

Ingredients

• 1 lb yukon gold potatoes, thinly sliced
• 12 oz sweet potatoes, thinly sliced
• 1 green apple, grated
• 1 onion, sliced thin
• 1 tbsp olive oil
• salt and pepper
• 1 cup grated Gruyere

Preparation

Step 1

Preheat oven to 350. Toss together potatoes, sweet potatoes, apple, onion, oil and 1 tsp salt. Season with pepper. Transfer to a 9x12 baking dish, spread in a thin layer, cover with foil. Bake for 15 minutes. Raise oven temp to 400, uncover dish and sprinkle with cheese. Bake until bubbling, 30 minutes.