Which food has less impact on blood sugar?

CRUST: WHEAT FLOUR, WATER, SOYBEAN OIL, YEAST, SUGAR, SALT, DOUGH CONDITIONER (WHEAT FLOUR, ASCORBIC ACID, ENZYMES). TOPPINGS: CHEESES (LOW MOISTURE PART-SKIM MOZZARELLA CHEESE [PASTEURIZED PART-SKIM MILK, CHEESE CULTURES, SALT, ENZYMES], CHEDDAR CHEESE [PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES, ANNATTO {COLOR}]), RANCH SAUCE (WATER, RANCH SEASONING BLEND [NONFAT MILK, MODIFIED CORN STARCH, MALTODEXTRIN, SALT, BUTTERMILK, ONION POWDER, SPICES, DISODIUM INOSINATE AND DISODIUM GUANYLATE, GARLIC POWDER, SOY LECITHIN, XANTHAN GUM, CARRAGEENAN, FULLY REFINED SOYBEAN OIL {ANTI-DUSTING AGENT}], SOYBEAN OIL), FULLY COOKED CHICKEN BREAST MEAT WITH RIB MEAT (CHICKEN BREAST MEAT WITH RIB MEAT, WATER, CHICKEN FLAVOR [{DEHYDRATED CHICKEN BROTH, CHICKEN POWDER, NATURAL FLAVOR}, CARRAGEENAN, SALT, CORNSTARCH, SPICE]), FULLY COOKED BACON TOPPING (BACON CURED WITH: WATER, SALT, SUGAR, SODIUM PHOSPHATE, SODIUM ERYTHORBATE, SODIUM NITRITE), CARAMELIZED ONIONS (ONION, RAPESEED AND/OR SUNFLOWER OIL), PARSLEY.