For the potatoes
01 -
3 large russet potatoes, about 1 1/2 lb (680 g), peeled and sliced 1/4 inch thick
02 -
1 tablespoon salt, for the potato water
03 -
1 tablespoon olive oil, for greasing the dish
For the meatballs
04 -
1 1/2 lb (680 g) ground beef, 80 to 85 percent lean
05 -
1 small yellow onion, finely grated or minced
06 -
2 cloves garlic, minced
07 -
1 large egg
08 -
1/2 cup (45 g) plain breadcrumbs
09 -
2 tablespoons chopped parsley
10 -
1 teaspoon sweet paprika
11 -
1 teaspoon kosher salt
12 -
1/2 teaspoon black pepper
For the bechamel and topping
13 -
4 tablespoons (56 g) unsalted butter
14 -
1/4 cup (32 g) all-purpose flour
15 -
3 cups (720 ml) warm whole milk
16 -
1/2 teaspoon kosher salt
17 -
1/4 teaspoon black pepper
18 -
1/8 teaspoon ground nutmeg
19 -
2 cups (225 g) shredded low-moisture mozzarella
20 -
1 tablespoon chopped parsley, for serving