METHOD: -Grill the bacon and cut it into small squares. -Lightly toast the bread and place on an oven tray. -Crumble the cheese and put with the mustard in a non-stick pan on a very low heat. -Stir well as it melts. -Sprinkle the bacon and spring onions on the toast. -Top with the melted cheese and mustard mixture and spread evenly. -Place in a hot oven for about seven minutes until lightly browned on top. -Serve with sliced fresh tomatoes.