Which food has less impact on blood sugar?

WHITE SUB SANDWICH ROLL (ENRICHED WHEAT FLOUR [WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMIN MONONITRATE, RIBOFLAVIN, FOLIC ACID], WATER, CONTAINS 2% OR LESS OF EACH OF: YEAST, SUGAR, SALT, MALTED BARLEY EXTRACT, WHEAT GLUTEN, VEGETABLE OIL [CANOLA OIL OR SOYBEAN OIL], FUMARIC ACID, PRESERVATIVES [CALCIUM PROPIONATE, PHOSPHORIC ACID, SODIUM PROPIONATE], WHEAT STARCH, DOUGH CONDITIONERS [MONO AND DIGLYCERIDES, ETHOXYLATED MONO AND DIGLYCERIDES, POLYSORBATE 60, ASCORBIC ACID, ENZYMES], LACTIC ACID, SODIUM DIACETATE, HYDROGENATED VEGETABLE OIL [SOYBEAN, PALM AND/OR COTTONSEED]), BLAZING BUFFALO STYLE OVEN ROASTED CHICKEN BREAST BONELESS SKINLESS (CHICKEN BREAST, WATER, CONTAINS 1.5% OR LESS OF SALT, SUGAR, SODIUM PHOSPHATE AND DEXTROSE, BROWNING IN COTTONSEED OIL, COATED WITH: CAYENNE RED PEPPER, VINEGAR, SALT, SPICE, PAPRIKA, RICE STARCH, GARLIC, CARAMEL COLOR), PEPPER JACK CHEESE (PASTEURIZED MILK, CHEESE CULTURES, JALAPENO PEPPERS, SALT, ENZYMES), LETTUCE, PRECOOKED BACON NATURAL SMOKED FLAVORING ADDED (CURED WITH WATER, SALT, SUGAR, NATURAL SMOKE FLAVORING, SODIUM PHOSPHATE, SODIUM ERYTHORBATE, SODIUM NITRATE).