Tuna salad on a croissant

tuna salad (tuna [with water, salt], dressing [lite mayonnaise {water, soybean oil, vinegar, corn starch-modified, egg yolks, sugar, salt, cultured nonfat milk, lactic acid, mustard flour, lemon juice concentrate, xanthan gum, natural flavors, beta-apo-8' - carotenal for color, calcium disodium edta to protect flavor}, mayonnaise (soybean oil, egg yolk, water, distilled vinegar, salt, sugar, lemon juice concentrate, natural flavor, calcium disodium edta to protect flavor], corn cider vinegar, salt, pepper], celery, red onions), croissant (enriched wheat flour [contains niacin, reduced iron, thiamine mononitrate, riboflavin, folic acid], water, unsalted butter, milk with vitamin d added, sugar, yeast, salt, contains 2% or less of: dough conditioner [wheat flour, salt, nonfat dry milk, datem, enzyme blend [sodium chloride, calcium sulfate and calcium silicate (anti-caking), wheat starch, enzyme preparation, sunflower oil), soybean oil, soy lecithin, dextrose, ascorbic acid]), lettuce.