How to Make Spinach Lasagna

INGREDIENTS:
For the filling:
2 tablespoons unsalted butter
24 ounces fresh spinach leaves
1 cup chopped fresh basil leaves
14 ounces ricotta cheese
2 eggs room temperature
1 1/2 cup grated Parmesan cheese
1 cup shredded Mozzarella cheese
1 teaspoon Italian seasoning
4 cloves garlic minced
1/2 teaspoon salt plus more to taste
1/4 teaspoon pepper plus more to taste
For assembly:
1 box lasagna noodles
24 ounce jar marinara sauce
2 cups shredded mozzarella cheese
cooking spray
2 tablespoons chopped parsley
2 tablespoons chopped basil