Butternut Squash Tikka Masala

Ingredients

• 1 tablespoon hazelnuts
• 1 tablespoon lemongrass, thickly sliced
• 1 teaspoon turmeric
• 1 star anise
• 1 teaspoon black peppercorns
• 1 teaspoon chili flakes
• ½ teaspoon mustard seeds
• 1 cinnamon stick
• ½ teaspoon black cumin
• 3 cloves
• 1 medium butternut squash
• 2 tablespoons olive oil
• 1 tablespoon butter
• 1 onion, minced
• ⅓ cup coconut milk
• 1 tablespoon parsley, chopped
• rice, cooked (for serving)