Best Béchamel Cheese Beef Lasagna

Ingredients:

For the Meat Sauce:

1 pound ground beef
1 onion, finely diced
3 garlic cloves, minced
1 can (28 oz) crushed tomatoes
2 tablespoons tomato paste
1 teaspoon dried basil
1 teaspoon dried oregano
Salt and pepper to taste
1 tablespoon olive oil

For the Béchamel Sauce:

4 tablespoons butter
1/4 cup all-purpose flour
2 cups whole milk
1/2 teaspoon nutmeg (optional)
Salt and pepper to taste
1 cup grated Parmesan cheese

For the Lasagna:

12 lasagna noodles, cooked according to package instructions
2 cups shredded mozzarella cheese
1/2 cup grated Parmesan cheese (for topping)
Fresh parsley for garnish (optional)