For the beef filling
01 -
1 1/2 lb (680 g) lean ground beef
02 -
1 tablespoon olive oil, if needed
03 -
1 small yellow onion, finely chopped
04 -
4 cloves garlic, minced
05 -
1 1/2 teaspoons Italian seasoning
06 -
1 teaspoon kosher salt, divided
07 -
1/2 teaspoon black pepper
For the Alfredo sauce
08 -
5 tablespoons (70 g) unsalted butter
09 -
4 tablespoons all-purpose flour
10 -
2 cups (480 ml) whole milk
11 -
1 cup (240 ml) heavy cream
12 -
1 1/4 cups (125 g) freshly grated Parmesan cheese
13 -
1/8 teaspoon ground nutmeg
14 -
1/2 teaspoon kosher salt, plus more to taste
For layering
15 -
12 no-boil lasagna noodles
16 -
15 oz (425 g) ricotta cheese
17 -
1 large egg
18 -
1/4 cup (25 g) grated Parmesan cheese
19 -
2 tablespoons chopped fresh parsley, plus more for garnish
20 -
2 cups (60 g) baby spinach, loosely packed
21 -
3 cups (340 g) shredded low-moisture mozzarella cheese