Cut Bread Diagonally Into 1-In. Slices To Within 1 In. Of Bottom. Repeat Cuts In Opposite Direction. Cut Swiss Cheese Into 1/4-In. Slices; Cut Slices Into Small Pieces. Insert Into Bread. Combine The Onion, Butter, Garlic And Salt; Spoon Over Bread. Wrap Loaf In Foil. Bake At 350