Which food has less impact on blood sugar?

ROMAINE LETTUCE, GRILLED SEASONED CHICKEN BREAST MEAT WITH RIB MEAT (CHICKEN BREAST MEAT WITH RIB MEAT, WATER, CULTURED SUGAR AND VINEGAR, POTATO STARCH, SEA SALT, NATURAL FLAVORINGS), DRESSING (CANOLA OIL, WATER, ROMANO CHEESE [MILK, CULTURE, SALT, ENZYMES], EGG YOLK, DISTILLED VINEGAR, SALT, DRIED GARLIC, DIJON MUSTARD [DISTILLED VINEGAR, WATER, MUSTARD SEED, SALT, WHITE WINE, CITRIC ACID, TURMERIC, TARTARIC ACID, SPICES], SUGAR, LEMON JUICE CONCENTRATE, ANCHOVIES, MUSTARD FLOUR, SPICE, XANTHAN GUM), SEASONED CROUTONS (WHEAT FLOUR, SUNFLOWER AND/OR SAFFLOWER OIL, CRACKED RYE, CRACKED WHEAT, YEAST, 2% OR LESS OF SALT, WHEAT GLUTEN, GARLIC POWDER, SUGAR, ONION POWDER, DEHYDRATED PARSLEY), PARMESAN CHEESE (PASTEURIZED PART SKIM MILK, CHEESE CULTURE, SALT, ENZYMES, FLOW AGENT: LESS THAN 2% MICROCELLULOSE CRYSTALLINE TO PREVENT CAKING)