Which food has less impact on blood sugar?

CRUST, (ENRICHED WHEAT FLOUR [WHEAT FLOUR, BENZOYL PEROXIDE (BLEACHING AGENT), NIACIN, REDUCED IRON, ASCORBIC ACID, THIAMINE MONONITRATE, RIBOFLAVIN, AMYLASE, FOLIC ACID], WATER, PALM AND MODIFIED PALM OIL SHORTENING, SUGAR, CANOLA OIL, YEAST, SALT, MILK PROTEIN CONCENTRATE, BAKING POWDER), TOPPING: MOZZARELLA CHEESE (PARTLY SKIMMED MILK, BACTERIAL CULTURE, SALT, CALCIUM CHLORIDE, MICROBIAL ENZYME), RANCH SAUCE: [CREAM, MILK, MILK PROTEIN CONCENTRATE, SEASONING (DEXTROSE, BUTTERMILK POWDER, SALT, YEAST EXTRACTS, NATURAL CHEESE FLAVOUR (MALTODEXTRIN, DEHYDRATED CHEDDAR CHEESE (MILK, SALT, ENZYMES), SALT, BUTTERMILK POWDER, NATURAL FLAVOUR, DISODIUM PHOSPHATE, CITRIC ACID, DRY YEAST), SODIUM DIACETATE, MODIFIED FOOD STARCH, SUGAR, TOMATO POWDER, ONION, GARLIC, SPICES (CHIVES, PARSLEY), SPICE EXTRACTS (ONION AND GARLIC OIL), SUNFLOWER OIL [MFG AID], TRICALCIUM PHOSPHATE [MFG AID]), GARLIC, MODIFIED FOOD STARCH, GUAR GUM, CARRAGEENAN, CAROB BEAN GUM, SODIUM CITRATE, SODIUM PHOSPHATE, BACTERIAL CULTURE], TOPPINGS: COOKED CHICKEN WHITE MEAT (CHICKEN WHITE MEAT, WATER, MODIFIED FOOD STARCH, SALT, SODIUM PHOSPHATE), ROASTED RED ONION, CHEDDAR CHEESE (MILK, BACTERIAL CULTURE, SALT, COLOR [ANNATTO], MICROBIAL ENZYME), PRECOOKED BACON (PORK CURED WITH WATER, SALT, SUGAR, SODIUM ERYTHORBATE, SODIUM NITRITE, POTASSIUM CHLORIDE DEXTROSE, SMOKE FLAVORING, SODIUM PHOSPHATES), POWDERED CELLULOSE (TO PREVENT CAKING), DEHYDRATED HERBS.