Butternut Squash Gratin

Bahan-bahan (6 porsi)

• 2 pound 1 medium butternut squash, peeled
• ½ cup 2% reduced fat milk
• 2 g arlic cloves (minced)
• 1 small shallot (minced)
• 1 tablespoon chopped fresh thyme
• 1/3 cup fresh grated parmesan cheese
• ¾ teaspoons kosher salt (divided)
• Freshly ground black pepper (to taste)
• Cooking spray
• 2 tablespoons unsalted butter
• ½ cup whole wheat or gluten-free panko