Oh man! This side dish is absolutely one we will be keeping around! It’d be really good on the smoker too! I do feel like it’s missing some seasonings so the next go around we will play with adding in some smoked paprika and garlic too! Creamy Au Gratin Potatoes Ingredients 8 medium russet potatoes, thinly sliced 2 medium onion, sliced into rings salt and ground black pepper to taste 6 tablespoons butter 6 tablespoons all-purpose flour 1 teaspoon salt 4 cups milk 3 cups shredded Cheddar cheese Directions Gather all ingredients. Preheat the oven to 400 degrees F (200 degrees C). Butter a 2-quart casserole dish. Layer 1/2 of the potatoes in the bottom of the prepared casserole dish; season with salt and pepper. Layer onion slices over top, then top with remaining potatoes. Season again with salt and pepper. Melt butter in a medium saucepan over medium heat. Gradually whisk in flour and salt and cook, whisking constantly until raw flour flavor has cooked off, abo...