Which food has less impact on blood sugar?

ICEBERG LETTUCE, RANCH DRESSING (SOYBEAN OIL, WATER, DISTILLED VINEGAR, EGG YOLKS, SOY SAUCE [WATER, WHEAT, SOYBEAN, AND SALT], SUGAR, BUTTERMILK, CONTAINS LESS THAN 2% OF SALT, GARLIC JUICE, ONION JUICE, NONFAT DRY MILK, LACTIC ACID, SPICE, DEHYDRATED PARSLEY, XANTHAN GUM, SOUR CREAM [CREAM, NONFAT MILK, CULTURES], NATURAL FLAVOR [INCLUDES MILK]), GRAPE TOMATOES, CHICKEN BREAST WITH RIB MEAT (CHICKEN BREAST MEAT WITH RIB MEAT, WATER, SODIUM LACTATE, SEASONING [SALT, SUGAR, ARTIFICIAL CHICKEN FLAVOR {HYDROLYZED CORN PROTEIN, AUTOLYZED YEAST EXTRACT, THIAMINE HYDROCHLORIDE, DISODIUM INOSINATE, DISODIUM GUANYLATE}, DEXTROSE, NATURAL FLAVORING], MODIFIED POTATO STARCH, DEXTROSE, POTASSIUM LACTATE, SODIUM PHOSPHATES, SODIUM DIACETATE), BACON (CURED WITH WATER, SALT, SODIUM PHOSPHATES, SODIUM ERYTHORBATE, SODIUM NITRITE, MAY ALSO CONTAIN: SUGAR, BROWN SUGAR, AND NATURAL SMOKE FLAVOR)