Which food has less impact on blood sugar?

TUNA SALAD (TUNA [FISH YELLOWFIN &/ OR TONGOLASH, WATER, SALT], MAYONNAISE [CANOLA OIL, EGG YOLK, WATER, DISTILLED VINEGAR, SUGAR, CONTAINS LESS THAN 2% OF SALT, LEMON JUICE CONCENTRATE & NATURAL FLAVOR], CELERY, BREADING [UNBLEACHED WHEAT FLOUR, NATURAL CANE SUGAR, YEAST, SEA SALT], DEHYDRATED VINEGAR, SORBIC ACID, SEA SALT, BLACK PEPPER, GARLIC SALT, XANTHAN GUM & CITRIC ACID), MULTIGRAIN BREAD (STONE GROUND WHOLE WHITE WHEAT FLOUR [UNBLEACHED, UNBROMATED ENRICHED WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN & FOLIC ACID], WATER, RYE FLOUR, RYE CHOPS, YEAST, CONTAINS 2% OR LESS OF THE FOLLOWING: SALT, SOYBEAN OIL, WHEAT GLUTEN, MALTED BARLEY EXTRACT, BARLEY, CRACKED WHEAT, CORNGRITS, RYE MALT, FLAXSEEDS, SPICES, MALTED BARLEY FLOUR, SESAME SEEDS CULTURED WHEAT FLOUR, MILLET, ASCORBIC ACID, GUAR GUM, COARSE GROUND OATS, ENZYMES, VEGETABLE MONO & DIGLYCERIDES), CUCUMBER, DILL WEED