Which food has less impact on blood sugar?

ICEBERG LETTUCE, RANCH DRESSING (SOYBEAN OIL, WATER, BUTTERMILK [CULTURED PASTEURIZED SKIM MILK AND MILK, SODIUM CITRATE AND SALT], MALTODEXTRIN, EGG YOLKS, DISTILLED VINEGAR, SALT, HIGH FRUCTOSE CORN SYRUP, SUGAR, CONTAINS LESS THAN 2% OF: DEHYDRATED ONION, XANTHAN GUM, DEHYDRATED GARLIC, SOUR CREAM [SOUR CREAM {CREAM, NON FAT MILK, CULTURES}, CULTURED NONFAT MILK, CITRIC ACID AND BHA {ADDED TO PROTECT FLAVOR}], SODIUM BENZOATE AND POTASSIUM SORBATE [AS PRESERVATIVES], PHOSPHORIC ACID, SPICE, AUTOLYZED YEAST EXTRACT, DEXTROSE, DEHYDRATED PARSLEY, CITRIC ACID, DISODIUM INOSINATE, DISODIUM GUANYLATE, CALCIUM DISODIUM EDTA [ADDED TO PROTECT FLAVOR]), SMOKED TURKEY BREAST (TURKEY BREAST, CURED WITH WATER, CONTAINS 2% OR LESS OF: SALT, DEXTROSE, MODIFIED CORN STARCH, SODIUM LACTATE, SODIUM PHOSPHATE, CARRAGEENAN, NATURAL FLAVORING, SODIUM DIACETATE, NATURAL MESQUITE SMOKE FLAVORING, ASCORBIC ACID, SODIUM NITRITE, CITRIC ACID), SMOKED HAM WATER ADDED (CURED WITH WATER, SUGAR, CONTAINS 2% OR LESS OF: SALT, SODIUM LACTATE, SODIUM PHOSPHATES, FLAVORING, SODIUM DIACETATE, SODIUM ERYTHORBATE, SODIUM NITRITE), SWISS CHEESE (PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES, POTATO STARCH, POWDERED CELLULOSE [TO PREVENT CAKING], NATAMYCIN [A NATURAL MOLD INHIBITOR]).