1 cup Dijon mustard
1/3 cup lemon juice
1/3 cup light brown sugar
1 (6 to 8 pound) spiral-cut fully cooked ham
1 fresh golden extra-sweet pineapple cored and sliced in 1/2-inch rings
1 tablespoon chopped fresh chives

Heat oven to 325 degrees F.

Blend mustard, lemon juice and brown sugar in small bowl for glaze. Reserve 1/2 cup.

Place ham, flat side down, in large non-aluminum roasting pan. Cover loosely with foil and bake in preheated oven for 60 minutes. Remove from oven; remove foil and turn ham on side.

Place pineapple slices in pan around ham. Generously brush ham and pineapple with glaze. Return to oven and bake in preheated oven for 45 minutes longer or until meat thermometer inserted into the thickest part of ham registers 140 degrees. Turn pineapple slices and brush ham and pineapple with additional glaze.

Stir chives into remaining glaze if desired. Serve ham and pineapple with glaze.