Which food has less impact on blood sugar?

ICEBERG & ROMAINE LETTUCE MIX (ICEBERG LETTUCE, ROMAINE LETTUCE), CHICKEN (BONELESS SKINLESS CHICKEN BREAST, WATER, SEASONING (SALT, HERBS AND SPICES, DEHYDRATED ONION, DEHYDRATED GARLIC)), LITE GREEK DRESSING (WATER, CANOLA OIL, SUGAR, EXTRA VIRGIN OLIVE OIL, OLIVE OIL, WHITE WINE VINEGAR, FETA CHEESE (MILK, SALT, CULTURE, ENZYMES), DISTILLED VINEGAR, MODIFIED CORN STARCH, SALT, DRIED ONION, DRIED GARLIC, NATURAL FLAVORS, SPICES, LEMON JUICE CONCENTRATE, ASCORBIC ACID, XANTHAN GUM, GUAR GUM, DRIED BELL PEPPER, GARLIC EXTRACT), GRAPE TOMATOES, FETA CHEESE CRUMBLES (PASTEURIZED MILK, CHEESE CULTURES, SALT, ENZYMES, POWDERED CELLULOSE (TO PREVENT CAKING)), RED ONION, CROUTONS (WHEAT FLOUR, SUNFLOWER OIL, CRACKED RYE, CRACKED WHEAT, YEAST, SEA SALT, 2% OR LESS OF SUGAR, WHEAT GLUTEN, DEHYDRATED ROASTED GARLIC, NATURAL OLIVE OIL FLAVOR, ASCORBIC ACID). SEASONING (ONION, SPICES (BLACK PEPPER, PARSLEY, CELERY SEED, BASIL, BAY, MARJORAM, OREGANO, SAVORY, THYME, CAYENNE PEPPER, CORIANDER, CUMIN, MUSTARD, ROSEMARY), GARLIC, CARROT, ORANGE PEEL, TOMATO LEMON JUICE POWDER, CITRIC ACID, OIL OF LEMON).