Berna's Notes:
Expand1/2 cup all purpose flour Ask a question about this ingredient
3 tablespoons butter Ask a question about this ingredient
1 egg Ask a question about this ingredient
3/4 cups grated parmesan cheese Ask a question about this ingredient
pinches salt Ask a question about this ingredient
pinches mustard powder Ask a question about this ingredient
1/2 teaspoon freshly ground pepper Ask a question about this ingredient
Mix the flour and butter in a food processor until crumbly.
Ask a question about this stepAdd the rest of the ingredients and process until dough forms a ball.
Ask a question about this stepRoll the dough into a log shape, wrap in plastic wrap and chill until firm.
Ask a question about this stepSlice the log into 1/4" slices. Bake at 375 degrees until brown around the edges, about 15 minutes.
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