Butter an 8 x 8-inch casserole dish generously and spread the Simply Potatoes evenly across the bottom.

In a medium saucepan over medium-high heat, combine milk, heavy cream, kosher salt, dry mustard, black pepper, and nutmeg. Stir until steaming, about 5-7 minutes.

Reduce heat to low and add sharp cheddar cheese, stirring until melted and smooth, about 3-4 minutes.

Pour the cheese mixture over the Simply Potatoes and gently toss to combine.

Dot the surface with thin slices of butter and sprinkle paprika. Cover with plastic wrap and refrigerate for at least 12 hours.

Preheat your oven to 350°F (175°C). Bake uncovered for approximately 45 minutes or until the top is bubbly and golden brown.