Creamy Asparagus Casserole Spring on a Plate - EPPYC

Ingredients

• 1.5 lbs fresh asparagus, trimmed (680g)
• 1 tablespoon olive oil (15 ml)
• 1/4 teaspoon salt (1.5g)
• 1/4 teaspoon black pepper (1.5g)
• 4 tablespoons unsalted butter (56g, 1/2 stick)
• 4 tablespoons all-purpose flour (30g)
• 3 cups whole milk (720ml)
• 1/2 teaspoon salt (3g)
• 1/4 teaspoon ground nutmeg (1.5g)
• 1/4 teaspoon white pepper (1.5g)
• 1 cup shredded Gruyère cheese (about 113g)
• 1/2 cup grated Parmesan cheese (about 57g)
• 1 cup panko breadcrumbs (about 45g)
• 2 tablespoons unsalted butter, melted (28g)
• 1/4 cup chopped fresh parsley (optional) (8g)