Fashion a paste of finely chopped scallions, soft butter or margarine, and mustard. Spread it on slices of pumpernickel bread without crust. Place one or two lettuce leaves over each slice, followed by small triangles of tomato and several thin slices of pasteurized Gruyère cheese.
Fashion a paste of finely chopped scallions, soft butter or margarine, and mustard. Spread it on slices of pumpernickel bread without crust. Place one or two lettuce leaves over each slice, followed by small triangles of tomato and several thin slices of pasteurized Gruyère cheese.