Slice Off The Top Third Of The Loaf; Set Top Aside. Hollow Out The Bottom Of The Loaf, Leaving A 1-In. Shell. Crumble Part Of The Removed Bread To Measure 3/4 Cup; Set Aside. (Discard Remaining Bread Or Save For Another Use.) In A Bowl, Combine Mayonnaise, Relish, Mustard, Garlic And Pepper. Stir In Eggs, Celery, Ham, Onion And Reserved Bread. Stuff Loaf; Replace Top. To Serve Immediately, Cut Into 4-In. Pieces. To Serve Hot, Brush With Butter; Wrap In Foil. Place On A Baking Sheet. Bake At 400 Degrees F For 25 Minutes.