Which food has less impact on blood sugar?

OVEN ROASTED TURKEY (TURKEY BREAST, NATURAL TURKEY BROTH, MODIFIED FOOD STARCH, CONTAINS LESS THAN 2% OF SALT, DEXTROSE, CARRAGEENAN, SODIUM PHOSPHATE, NATURAL FLAVORINGS), BREAD (WHOLE WHEAT FLOUR, WATER, CRACKED WHEAT, ROLLED OATS, HONEY, WHEAT GLUTEN, SOYBEAN OIL, SEA SALT, CRACKED BARLEY, CRACKED CORN, CRACKED RYE, CRACKED BROWN RICE, CRACKED TRITICALE, YEAST, WHITE DISTILLED VINEGAR, SOY LECITHIN, CRACKED HULLED MILLET, CRACKED OATS, CRACKED SOY, CRACKED FLAX SEEDS, WHEAT FLOUR, CULTURED WHEAT STARCH, ENZYMES, ASCORBIC ACID [ADDED AS A DOUGH CONDITIONER], CITRIC ACID), TOMATOES, LETTUCE, FULLY COOKED BACON STRIPS SMOKE FLAVOR ADDED (CURED WITH WATER, SALT, SUGAR, SMOKE FLAVORING, SODIUM PHOSPHATE, SODIUM ERYTHORBATE, SODIUM NITRITE).