Ginger-Cashew Chicken Casserole

Ingredients

• 1 tablespoon sesame oil
• 1 medium onion, halved and thinly sliced
• 1 stalk celery, thinly sliced on the diagonal
• 1 medium red bell pepper, seeded and cut into 1-inch pieces
• 1 cup sliced mushrooms
• red pepper flakes (to taste)
• 1 (20 ounce) can pineapple chunks, in juice
• 1 tablespoon cornstarch
• 1 tablespoon soy sauce
• 1 tablespoon grated fresh ginger
• 2 cups cooked rice
• 2 cups diced cooked chicken
• 12 cup cashews, for garnish
• chopped fresh cilantro, for garnish