Cheesy Asparagus Casserole!!!

• 2 lbs (900g) fresh asparagus, woody ends trimmed, cut into 2-inch pieces
• 2 tbsp unsalted butter
• 2 tbsp all-purpose flour
• 1½ cups (360ml) whole milk
• 1 cup (4 oz) shredded sharp cheddar cheese
• ½ cup (2 oz) shredded Parmesan cheese
• ½ tsp garlic powder
• ¼ tsp ground nutmeg (optional but classic)
• Salt & black pepper to taste

For the Topping:

• ½ cup panko breadcrumbs (or crushed crackers)
• 2 tbsp melted butter
• 2 tbsp grated Parmesan cheese
• Optional: ¼ tsp paprika for color