Ingredients
- 1 cup yellow onion
- 1/4 cup all-purpose flour
- 2 cups heavy cream
- 2 cups whole milk
- 1 1/2 tsp salt (optional)
- 1 tsp cajun seasoning
- 1/4 tsp black pepper
- 1/8 tsp freshly grated nutmeg
- 1/4 tsp worcestershire sauce
- 2 tsp fresh thyme leaves
- 4 1/2 lb russet potatoes
- 2 cups sharp cheddar cheese
- 1 lb ham
Steps
- Heat the oven to 375 F and grease a 9-by-13-inch baking dish with cooking oil.
- Whisk the flour, cream, milk, salt, Cajun seasoning, pepper, nutmeg, Worcestershire sauce, and thyme in a saucepan.
- Cook the sauce over medium heat for 8 minutes, stirring until slightly thickened.
- Layer the sliced potatoes, onion, and ham in the baking dish, then pour the sauce over them.
- Cover tightly with foil and bake for 75 minutes.
- Remove the foil, sprinkle the cheddar over the casserole, and bake for 20 minutes until the potatoes are tender and the cheese bubbles.
- Rest the casserole for 10 minutes before cutting.
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