Zesty Pesto Encrusted Stuffed Whole Chicken

2 (3 lb.) whole stuffed chickens1 (16-oz.) container chopped onion mix2 c. chicken broth½ c. good quality pesto¼ c. Horseradish mustard¼ c. fresh lemon juice3 T. minced garlicSalt, red/black pepper, garlic powder2 lemons slicedPaprika  1. I used my Crock-Pot Grill…