In A Small Microwave-Safe Bowl, Beat Cream Cheese And Garlic Powder Until Smooth. Stir In Spinach And Swiss Cheese. Cover And Microwave On High For 3-6 Minutes Or Until Cheese Is Melted, Stirring Occasionally. Meanwhile, Cut A 4-In. Circle In The Center Of One Loaf Of Bread. Remove Bread, Leaving 1 In. At Bottom Of Loaf. Cut Removed Bread And The Second Loaf Into 1-1/2-In. Cubes. Spoon Hot Spinach Dip Into Bread Shell. Serve With Bread Cubes.