Which food has less impact on blood sugar?

ROMAINE LETTUCE, OVEN ROASTED CHICKEN BREAST MEAT WITH RIB MEAT (CHICKEN BREAST MEAT WITH RIB MEAT, WATER, LESS THAN 2% RICE STARCH, LEMON JUICE CONCENTRATE, VINEGAR, SALT, SUGAR, YEAST EXTRACT, NATURAL FLAVORS), CAESAR DRESSING (WATER, SOYBEAN OIL, PARMESAN CHEESE [PASTEURIZED PART SKIM MILK, CHEESE CULTURES, SALT, ENZYMES], DISTILLED VINEGAR, ROMANO CHEESE [PASTEURIZED COW'S MILK, CHEESE CULTURES, SALT, ENZYMES], EGG YOLKS, SALT, SUGAR, CONTAINS LESS THAN 2% OF LEMON JUICE CONCENTRATE, GRANULAR CHEESE [PASTEURIZED MILK, CHEESE CULTURES, SALT, ENZYMES], GARLIC*, SPICES [INCLUDES MUSTARD], XANTHAN GUM, ONION*, ENZYME MODIFIED CHEESE [CULTURED MILK, WATER, SALT, ENZYMES], ANCHOVY, MOLASSES, LACTIC ACID, NATURAL FLAVORS, GUM ACACIA, ENZYMES, TAMARIND CONCENTRATE, CELERY SEED) PARMESAN CHEESE (PASTEURIZED MILK, CHEESE CULTURES, SALT, ENZYMES, POWDERED CELLULOSE [TO PREVENT CAKING]), MULTIGRAIN CAESAR CROUTON (ENRICHED WHEAT FLOUR [WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], CANOLA OIL AND/OR OLIVE OIL, SALT, SUGAR, RYE MEAL, WHEAT BRAN, YEAST, CARAMEL COLOR, DEHYDRATED GARLIC, CORN MEAL, SPICES, CARAWAY SEEDS, NATURAL BUTTER FLAVOR [MILK], CITRIC ACID, ASCORBIC ACID).