Combine yogurt, lemon juice, garlic, paprika, cardamom, ginger and red pepper flakes in a blender.
Process until smooth.
Cut slashes in chicken and place in a shallow casserole dish.
Add half of the yogurt mixture, reserving the remainder.
Cover and chill for about 15 minutes.
Preheat oven to 400 degrees F.
Spray another shallow baking dish with cooking spray.
Remove and drain chicken.
Discard yogurt mixture in dish.
Place chicken in prepared dish.
Brush chicken with reserved yogurt.
Bake for 20 minutes or until juices run clear when meat is pierced.
Serve immediately.