Which food has less impact on blood sugar?

ROMAINE LETTUCE, BUTTERMILK RANCH DRESSING (BUTTERMILK, SOYBEAN OIL, WATER, DISTILLED VINEGAR, EGG YOLKS, CONTAINS LESS THAN 2% OF SALT, SUGAR, NATURAL FLAVOR, DRIED GARLIC, DRIED ONION, CULTURED NONFAT MILK, XANTHAN GUM, SPICES [CONTAINS MUSTARD], LACTIC ACID, NONFAT MILK, LEMON JUICE CONCENTRATE), GREEN LEAF LETTUCE, CHICKEN BREAST MEAT WITH RIB MEAT (CHICKEN BREAST MEAT WITH RIB MEAT, WATER, CULTURED SUGAR AND VINEGAR, POTATO STARCH, SEA SALT, NATURAL FLAVORINGS), GRAPE TOMATOES, MILD CHEDDAR CHEESE (CHEDDAR CHEESE [PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES, ANNATTO {VEGETABLE COLOR}], POTATO STARCH [TO PREVENT CAKING], POWDERED CELLULOSE [TO PREVENT CAKING], NATAMYCIN [A NATURAL MOLD INHIBITOR]), HARD COOKED EGGS, FULLY COOKED BACON TOPPING CURED WITH: WATER, SALT, SODIUM ERYTHORBATE, SODIUM NITRITE. MAY CONTAIN SUGAR, SMOKE FLAVORING, SODIUM PHOSPHATE), CARROT, RADICCHIO.