query: SELECT ?sandwich ?ingredient ?sandwichLabel ?ingredientLabel
  WHERE
  {
    ?sandwich wdt:P31?/wdt:P279* wd:Q28803;
              wdt:P527 ?ingredient.
    MINUS { ?ingredient wdt:P279* wd:Q7802. }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en", "fr". }
  }
  ORDER BY UCASE(STR(?sandwichLabel))