Which food has less impact on blood sugar?

ROMAINE LETTUCE, CHICKEN BREAST MEAT WITH RIB MEAT (CHICKEN BREAST MEAT WITH RIB MEAT, WATER, LESS THAN 2% RICE STARCH, SALT, VINEGAR, SUGAR), CAESAR DRESSING (SOYBEAN OIL, WATER, PARMESAN CHEESE [PASTEURIZED MILK, CHEESE CULTURES, SALT, ENZYMES], EGG YOLKS, RED WINE VINEGAR, CONTAINS LESS THAN 2% OF WORCESTERSHIRE SAUCE [DISTILLED VINEGAR, MOLASSES, SUGAR, WATER, SALT, ONION, ANCHOVY, GARLIC, SPICE, TAMARIND EXTRACT, NATURAL FLAVORS, CHILI PEPPER EXTRACT], SALT, LEMON JUICE CONCENTRATE, GARLIC, SPICE, MUSTARD SEED, ANCHOVY EXTRACT, XANTHAN GUM, DEHYDRATED ONION, DEHYDRATED GARLIC), CROUTONS (WHEAT FLOUR, SUNFLOWER OIL, WHEAT FLAKES, PALM OIL SHORTENING*, SEA SALT, WHEY POWDER, SUGAR, CHEESE POWDER [CHEESE, WHEY POWDER], MALTODEXTRIN, YEAST, YEAST EXTRACT, GARLIC POWDER, DEHYDRATED PARSLEY, NATURAL FLAVOR, CITRIC ACID, MALTED BARLEY FLOUR, SPICES, ROSEMARY EXTRACT), PARMESAN CHEESE (PARMESAN CHEESE [PASTEURIZED MILK, SALT, CHEESE CULTURE, ENZYMES], POWDERED CELLULOSE [TO PREVENT CAKING], POTATO STARCH [TO PREVENT CAKING]).