Which food has less impact on blood sugar?

VEGETABLES: ROMAINE LETTUCE. DRESSING: SOYBEAN OIL, WATER, PARMESAN CHEESE (PASTEURIZED COW'S MILK, CHEESE CULTURES, SALT, ENZYMES, POWDERED CELLULOSE (TO PREVENT CAKING)), CORN VINEGAR, SUGAR, SALT, DEHYDRATED GARLIC, NATURAL FLAVORS (SOY), SPICES (MUSTARD), EGG YOLKS, DISTILLED VINEGAR, ANCHOVY PASTE (ANCHOVIES, SALT, WATER), CITRIC ACID, LEMON JUICE CONCENTRATE, YEAST EXTRACT, EXTRACTIVE OF RICE, XANTHAN GUM, DEHYDRATED ONION. CROUTONS: ENRICHED WHEAT FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), CANOLA OIL, GARLIC POWDER, SALT, WHOLE WHEAT FLOUR, SUGAR, YEAST, DEHYDRATED PARSLEY, ROMANO CHEESE (PASTEURIZED COW'S MILK, CHEESE CULTURE, SALT, ENZYMES), ONION POWDER, SPICES, YEAST EXTRACT. PARMESAN AND ROMANO CHEESE: PARMESAN CHEESE (PASTEURIZED COW'S MILK, SALT, CHEESE CULTURE, ENZYMES), ROMANO CHEESE (PASTEURIZED COW'S MILK, SALT, CHEESE CULTURE, ENZYMES), POWDERED CELLULOSE (TO PREVENT CAKING).