Pressure Cooker Coconut Curry Chicken

Ingredients

• 3 to 4 ripe tomatoes, halved through their equators
• 3 tablespoons ghee, unsalted butter or safflower oil
• 3 tablespoons virgin coconut oil
• 2 cups finely chopped onions
• 6 garlic cloves, grated on a Microplane or minced
• 2 tablespoons grated peeled fresh ginger
• 1 teaspoon cumin seeds
• 1 3-inch cinnamon stick or 1/2 teaspoon ground cinnamon
• 8 cardamom pods, lightly crushed with the flat side of a knife, or 1 teaspoon ground cardamom
• 2 teaspoons ground coriander
• 1 tablespoon kosher salt
• 1 teaspoon ground turmeric
• ¼ teaspoon crushed red pepper flakes
• ¼ teaspoon black pepper
• 2 ½ pounds boneless, skinless chicken thighs, cut into 1-inch chunks
• 1 to 2 teaspoons garam masala, to taste
• ½ cup canned unsweetened coconut milk
• Cooked basmati rice, for serving (optional)
• Plain yogurt, for serving (optional)
• 3 tablespoons finely chopped fresh cilantro, for garnish