Cheesy Spinach Party Loaf
["1 1/2 lb. round sourdough bread loaf", "1/3 c. margarine, divided", "2/3 c. chopped red or green pepper", "1/3 c. chopped celery", "1/3 c. chopped onion", "1 lb. Velveeta, cubed", "1 (10 oz.) pkg. frozen, chopped spinach, cooked, drained and squeezed", "1/4 tsp. dried rosemary leaves, crushed"]
["Cut slice from top of bread.", "Remove center, leaving 1-inch shell. Cut removed bread into bite size pieces; save.", "Brush sides of shell with 3 tablespoons melted margarine. Place on cookie sheet, along with saved bread.", "Bake at 350\u00b0 for 20 minutes."]
["bread", "margarine", "red", "celery", "onion", "rosemary"]