Combine yogurt, lemon, and spices in medium bowl. Add in the chicken and combine so chicken is fully covered.
Cover and place in refrigerator overnight.
Heat oil in medium sauce pan or dutch oven over medium high heat.
Add marinated chicken and cook 4-5 minutes per side until cooked through and lightly browned.
Add in pumpkin butter, mix to combine.
Add in milk, apple cider vinegar, and salt. Cover, and simmer 25-30 minutes.
Add in butter, melt and stir to combine.
Cook rice according to package instructions.
Serve in bowl with rice and top with pumpkin butter chicken.