Place in greased muffin pans cut side up and separate slices slightly at top. Cover with damp tea towel or cloth and let rise for 2 hours or until double in bulk at warm room temperature (75 to 85 degrees F.). (a) When ready to bake buns should be up to top of pan or slightly higher. (b) Place rolls in preheated oven 375 degrees F (moderately hot) and bake for 20 minutes. Remove from oven. Turn out on wire rack, brush tops with melted butter.