Which food has less impact on blood sugar?

FLATBREAD (ENRICHED WHEAT FLOUR [WHEAT FLOUR, REDUCED IRON, NIACIN, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], WATER, WHEAT GLUTEN, SOYBEAN OIL, HONEY, CONTAINS 2% OR LESS OF RAISIN JUICE CONCENTRATE, SUGAR, YEAST [CONTAINS SORBITAN MONOSTEARATE], DEFATTED SOY FLOUR, OAT FIBER, OAT HYDROCOLLOID [OAT BRAN, OAT FIBER], SALT, GUM BLEND [GUAR GUM, XANTHAN GUM, CARRAGEENAN], FUMARIC ACID, BAKING POWDER [SODIUM ACID PYROPHOSPHATE, SODIUM BICARBONATE, MONOCALCIUM PHOSPHATE], SODIUM BICARBONATE, POTASSIUM SORBATE [PRESERVATIVE], SODIUM PROPIONATE [PRESERVATIVE]), WHITE CHEDDAR CHEESE (PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES), TURKEY BREAST (TURKEY BREAST MEAT, TURBINADO SUGAR, HONEY, SALT, CONTAINS 2% OR LESS OF WATER, DRIED VINEGAR, CULTURED CELERY POWDER, CHERRY POWDER, LACTIC ACID STARTER CULTURE), UNCURED BACON (PORK, WATER, SALT, TURBINADO SUGAR, SMOKE FLAVORING, CULTURED CELERY POWDER)