Ingredients

The following ingredients have 10 Servings
  • 4 tablespoons butter
  • 1/2 cup chopped onion
  • 1 teaspoon ground mustard
  • 1 teaspoon salt
  • 1/2 teaspoon coarsely ground pepper
  • 2 garlic cloves, minced
  • 1/4 cup all-purpose flour
  • 2 cups whole milk
  • 3 blocks (4 ounces each) sharp cheddar cheese, shredded and divided
  • 1 block (4 ounces) Monterey Jack cheese, shredded
  • 3 pounds russet potatoes, peeled and thinly sliced
  • 3/4 cup dry bread crumbs
  • Minced chives, optional

Instruction

  • 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.