Which food has less impact on blood sugar?

KING'S HAWAIIAN SWEET PRETZEL HAMBURGER BUN (ENRICHED FLOUR [WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], WATER, SUGAR, MARGARINE (SOYBEAN OIL, PALM OIL, WATER, SALT, CONTAINS 2% OR LESS OF: BUTTER, SWEET CREAM BUTTERMILK SOLIDS, MONO-& DIGLYCERIDES, SOYBEAN LECITHIN, NATURAL FLAVOR, CITRIC ACID, BETA CAROTENE (COLOR), VITAMIN A PALMITATE), SALT, EGGS, WHEAT GLUTEN, CONTAINS 2% OR LESS OF THE FOLLOWING SODIUM SILICOALUMINATE. FULLY HYDROGENATED VEGETABLE OIL (ONE OR MORE OF THE FOLLOWING: SOYBEAN OIL, PALM OIL, COCONUT OIL, AND COTTONSEED OIL), PEA PROTEIN, SUNFLOWER OIL, MALTODEXTRIN, DEXTROSE, POTATO FLOUR, YEAST, SORBITAN MONOSTEARATE, ASCORBIC ACID [ADDED AS A DOUGH CONDITIONER], WHEY, CORN FLOUR, MONOCALCIUM PHOSPHATE, ENZYMES, SOY FLOUR, NONFAT MILK, NATURAL FLAVOR, DATEM, CALCIUM SILICATE (ANTI-CAKING), MONOCALCIUM PHOSPHATE MONOHYDRATE, SODIUM BICARBONATE, SODIUM STEAROYL LACTYLATE, SORBIC ACID (PRESERVATIVE), MONO-& DIGLYCERIDES, CALCIUM SULFATE, AMMONIUM SULFATE, SODIUM HYDROXIDE, WHEAT STARCH, AND CALCIUM PHOSPHATE), TURKEY (TURKEY BREAST, TURKEY BROTH AND 2% OR LESS OF SALT, SUGAR, SODIUM PHOSPHATE), SMOKED HAM (CURED WITH WATER, DEXTROSE, CONTAINS 2% OR LESS OF: SALT, SODIUM LACTATE, POTASSIUM LACTATE, MODIFIED FOOD STARCH, SODIUM PHOSPHATES, SODIUM DIACETATE, SODIUM ERYTHORBATE, SMOKE FLAVORING, SODIUM NITRITE), CHEDDAR CHEESE (PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES, ANNATTO [VEGETABLE COLOR]), GREEN LEAF LETTUCE