Which food has less impact on blood sugar?

ICEBERG LETTUCE, PIZZA STYLE RANCH DRESSING (SOYBEAN OIL, WATER, DISTILLED VINEGAR, BUTTERMILK, EGG YOLKS, SALT, CONTAINS LESS THAN 2% OF SUGAR, DEHYDRATED TOMATO, SPICES, DEHYDRATED ONION, DEHYDRATED GARLIC, YEAST EXTRACT, NATURAL FLAVORS, XANTHAN GUM, AUTOLYZED YEAST EXTRACT, LEMON JUICE CONCENTRATE, DEHYDRATED PARSLEY, LACTIC ACID, CITRIC ACID, WHEY OLEORESIN PAPRIKA [COLOR], PARMESAN CHEESE [MILK, SALT, CULTURE, ENZYMES]), FLATBREAD STRIPS (WHEAT FLOUR, WATER, YEAST, PALM OIL, SALT, SUGAR, SUNFLOWER OIL, ONION POWDER, GARLIC POWDER, MALTODEXTRIN, SPICES, TOMATO POWDER, BUTTER FLAVOR [MALTODEXTRIN, BUTTER FLAVOR {BUTTER, SWEET BUTTERMILK, NATURAL FLAVOR}], CARROT POWDER, YEAST EXTRACT, CELERY POWDER, ASCORBIC ACID, ROSEMARY EXTRACT), MOZZARELLA CHEESE (LOW MOISTURE PART-SKIM MOZZARELLA CHEESE [PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES], POTATO STARCH [TO PREVENT CAKING], POWDERED CELLULOSE [TO PREVENT CAKING], NATAMYCIN [A NATURAL MOLD INHIBITOR]), ITALIAN SAUSAGE TOPPING (PORK, SPICES, SALT, SUGAR, NATURAL FLAVORINGS, DEHYDRATED GARLIC), CARROT, RED CABBAGE, PARMESAN (PARMESAN [PASTEURIZED MILK, SALT, POWDERED CELLULOSE {TO PREVENT CAKING}, CHEESE CULTURES, ENZYMES]).