INGREDIENTS
1 10 ounce package
Spinach, frozen dry
1
Egg, large
1 cup
Pesto, store-bought
12
Lasagna noodles
2 tbsp
All-purpose flour
1
Kosher salt and freshly ground black pepper
1
Red pepper flakes
1 tbsp
Olive oil, extra-virgin
2 tbsp
Butter, unsalted
2 1/2 cups
Mozzarella
3/4 cup
Parmesan, grated
1 1/2 cups
Whole milk
2 cups
Whole milk ricotta