Which food has less impact on blood sugar?

VEGETABLES: ROMAINE LETTUCE. DRESSING: LOWFAT BUTTERMILK (CULTURED PASTEURIZED PART-SKIM MILK, NONFAT MILK POWDER, SALT), VEGETABLE OIL (SOYBEAN AND/OR CANOLA OIL), RED BALSAMIC VINEGAR (WINE VINEGAR, CONCENTRATED GRAPE MUST), PARMESAN CHEESE (PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES), WATER, ROASTED GARLIC, SALT, EGG YOLK, SPICES (MUSTARD), DISTILLED VINEGAR, SUGAR, XANTHAN GUM. CROUTONS: ENRICHED WHEAT FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), CANOLA OIL, SUGAR, SALT, CONTAINS LESS THAN 2% OF EACH OF THE FOLLOWING: WHEY, YEAST, GARLIC POWDER, ROMANO CHEESE MADE FROM COW'S MILK (PART SKIM MILK, CULTURE, SALT, ENZYMES), DRIED TOMATO, DRIED PARSLEY, YEAST EXTRACT, SPICES, WHITE VINEGAR, NATURAL FLAVOR, BUTTERMILK, ROSEMARY EXTRACTIVES, ASCORBIC ACID (TO MAINTAIN FRESHNESS). CHEESE: PARMESAN, ROMANO, MEDIUM ASIAGO CHEESES (PASTEURIZED COW'S MILK, CHEESE CULTURE, SALT, ENZYMES), POWDERED CELLULOSE (TO PREVENT CAKING), NATAMYCIN (A NATURAL MOLD INHIBITOR). SEASONING: SPICES (BLACK PEPPER, CUMIN, OREGANO), SALT, DEHYDRATED GARLIC, DEHYDRATED ONION, DEHYDRATED RED BELL PEPPER, YEAST EXTRACT, SPICE EXTRACTIVE, OIL OF GARLIC.