Slice off top fourth of loaves, using a large serrated knife. Hollow out bottom pieces, leaving a 1-inch-thick shell; reserve remaining bread. Place "bread bowls" on a baking sheet, and bake at 375° for 10 minutes or until dry. Cut all reserved bread into bite-size pieces; place on a baking sheet, and bake at 375° for 10 minutes or until dry.
Combine sour cream, Neufcha@Gtel cheese, yogurt, and garlic powder in a bowl; beat at medium speed of a mixer until smooth. Stir in ham, spinach, and pimento. Divide mixture between the bread bowls, and sprinkle Parmesan cheese over spinach mixture. Bake at 375° for 30 minutes or until thoroughly heated. Serve warm with reserved bread.