Best Butternut Squash Casserole Recipe - How To Make Butternut Squash Casserole

Ingredients

• Nonstick cooking spray
• 1/2 lb. thick-cut bacon, sliced 1" thick
• 1 (2-lb.) butternut squash, peeled, seeded, and cut into 1" pieces
• 1 medium yellow onion, finely chopped
• 1 leek, halved and sliced 1/2" thick
• 3 c. roughly chopped kale (from about 1 bunch)
• 2 cloves garlic, thinly sliced
• 2 tbsp. chopped fresh sage
• 2 tbsp. fresh thyme leaves
• 2 tsp. kosher salt
• 1 tsp. freshly ground black pepper
• 1 c. fresh or preshredded shredded mozzarella
• 1 c. shredded sharp white cheddar
• 1/2 c. panko bread crumbs
• 1 tbsp. dried Italian seasoning
• 1 tbsp. extra-virgin olive oil