I made curried chicken [thighs and legs] in the slow cooker. The recipe called for onion, garlic, cumin, cinnamon, ginger, turmeric, cloves, cardamon, and crushed red pepper flakes. Spices were good so that was not the problem. But when the chicken was cooked the sauce was bland and without flavor. I followed the recipe which called for adding spices, etc at beginning of cook time. Should I have added them later? At the end? What happened???