PLACE artichokes evenly in bottoms of 2 full-size hotel pans sprayed with cooking spray. (Or, use one 1/3-size hotel pan for trial recipe.)
BEAT cream cheese and mayonnaise in large bowl of electric mixer fitted with paddle attachment until well blended. Add spinach, garlic, lemon juice and pepper; mix well. Spread evenly over artichokes in pans.
BAKE in 325°F-convection oven for 20 to 30 minutes or until thoroughly heated (140°F).