Remove neck (if still attached) and giblets from chicken cavity
Stuff cavity with onion and lemon
Mix all spices together and rub generously on top and underneath the skin on all sides.
Tuck pieces of butter underneath the skin on the breast side. Place chicken in pressure cooker, breast side up.
Add 1 cup water to the side of the chicken, being careful not to wash off spices.
Close lid, set Steam Valve to closed. For Crock Pot Express, select Poultry Setting and change time to 30 minutes for a 3 - 4 lb chicken. Since my chicken was almost 5 1/2 pounds, I cooked for 35 minutes. For an Instant Pot, you can choose Manual, High Pressure, 30 minutes.
After finished cooking, let steam release naturally for about 10 minutes before carefully opening steam vent. Slowly open lid, taking care not to force it open.