Brussel Sprouts Casserole

Ingredients (13)

• 3 slices thick-cut bacon
• 2 pounds brussels sprouts
• 1/2 yellow onion
• 3/4 teaspoon kosher salt
• 1 tablespoon unsalted butter
• 2 tablespoons all-purpose flour
• 1 1/2 cups 2% milk
• 1 tablespoon chopped fresh thyme
• 1/4 teaspoon black pepper
• Pinch ground nutmeg
• 1/2 cup freshly grated Gruyère cheese
• 1/4 cup whole wheat bread crumbs
• Olive oil cooking spray