sweet & sour chicken (crockpot)

Ingredients

• 1 - onion, sliced
• 1 - carrot, sliced
• 1 - celery rib, sliced
• 2 pounds boneless skinless chicken thighs cut into bite-size pieces
• 1/2 cup packed brown sugar
• 1/2 cup catalina dressing
• 1/3 cup soy sauce
• 1 teaspoon grated ginger root
• 1 tablespoon crushed red pepper flakes (or to taste)
• 2 tablespoons cornstarch
• 1 can (8 oz) pineapple tidbits, drained, liquid reserved
• 1 - each, green and red bell pepper, cut into strips
• 2 cups sugar snap peas
• 4 - 6 cups hot cooked long-grain white rice.