WHAT ARE THE BEST POTATOES TO USE FOR SCALLOPED RECIPES

Steps:

• Preheat oven to 350°. In a Dutch oven, melt butter over medium heat. Add onion, mustard, salt and pepper; cook until onion is tender, 6-8 minutes. Add garlic; cook until fragrant. Whisk in flour; continue whisking 3-5 minutes., Whisk in milk; bring to a boil. Reduce heat; simmer, uncovered, until thickened slightly, 8-10 minutes. Gradually stir in 2 cups shredded cheddar cheese; stir in Monterey Jack cheese. Add potatoes and toss to coat. Simmer 10 minutes, stirring frequently., Transfer potato mixture to a greased 13x9-in. baking dish. Top with remaining cheddar cheese. Bake, uncovered, for 1 hour. Top with bread crumbs; return to oven until potatoes are tender, 10-15 minutes. Let stand 15 minutes before serving. If desired, sprinkle with chives.

Steps:

• Preheat oven to 350 degrees. Butter a large casserole dish.
• Heat butter in a large skillet. Add onions and cook for 1 to 2 minutes, or until they start to turn translucent. Add ham and cook for 3 to 4 minutes until thoroughly heated. Remove from heat and set aside. 
• Combine half-and-half and cream in a microwave-safe container and nuke for a minute or so, until no longer cold. Whisk in flour and black pepper until totally combined. Set aside. (You may add salt, but cheese and ham are salty, so add sparingly.)
• Combine the two grated cheeses. Set aside.
• Using a mandoline or slicer, slice potatoes into 1/8-inch slices (very thin.) Layer 1/3 of the potato slices in the buttered casserole dish. Sprinkle on 1/3 of the ham/onion mixture, then 1/3 of the cheese, then pour on 1/3 of the cream mixture. 
• Repeat this twice more, ending with a sprinkling of cheese and a pouring on of the rest of the cream mixture. Cover dish with foil and bake for 40 minutes. Remove the foil and bake for an additional 20 minutes at least, or until bubbly and hot. 
• Cut into squares and serve. Sprinkle on chopped parsley if you'd like!
• (Note: To speed along the process a bit, you may boil sliced potatoes for 3 to 5 minutes before assembling the casserole. Just drain and slightly cool before assembling.)