Which food has less impact on blood sugar?

FLATBREAD (ENRICHED FLOUR [WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, IRON, THIAMIN MONONITRATE, RIBOFLAVIN, FOLIC ACID], WATER, WHOLE WHEAT FLOUR, SOYBEAN OIL, YEAST, GLYCERIN, XANTHAN GUM, SUGAR, CALCIUM PROPIONATE, SALT, CALCIUM SULFATE, SORBIC ACID), SAUSAGE PATTY (PORK, SEASONING [SALT, DEXTROSE, CULTURED WHEY, SPICE, SPICE EXTRACTIVES], WATER, SOY PROTEIN CONCENTRATE, VINEGAR POWDER, DEXTROSE, SODIUM PHOSPHATE), BLUEBERRY MUFFIN (CAKE MIX [SUGAR, ENRICHED BLEACHED FLOUR (WHEAT FLOUR, NIACIN, IRON, THIAMIN MONONITRATE, RIBOFLAVIN, FOLIC ACID), SOYBEAN OIL, MODIFIED CORN STARCH, CONTAINS 2% OR LESS OF: MONO & DIGLYCERIDES, LEAVENING (BAKING SODA, SODIUM ALUMINUM PHOSPHATE), MODIFIED WHEY, SALT, SODIUM STEAROYL LACTYLATE, SORBITAN MONOSTEARATE, CALCIUM ACETATE, NONFAT MILK, XANTHAN GUM, GUAR GUM, NATURAL AND ARTIFICIAL FLAVOR, VITAL WHEAT GLUTEN, POLYSORBATE 60, EGG, SOY FLOUR], WHOLE EGGS, SOYBEAN OIL, WATER, BLUEBERRIES, SUGAR, CORN SYRUP SOLIDS, GLYCERINE, NATURAL AND ARTIFICIAL FLAVORS, PRESERVATIVES [SORBIC ACID, POTASSIUM SORBATE, CITRIC ACID]), CHEDDAR PASTEURIZED PREPARED CHEESE PRODUCT (MILK, WATER, MILK PROTEIN CONCENTRATE, MILKFAT, WHEY, WHEY PROTEIN CONCENTRATE, SODIUM CITRATE, SALT, LACTIC ACID, SORBIC ACID AS A PRESERVATIVE, CHEESE CULTURE, ENZYMES, OLEORESIN PAPRIKA [COLOR], ANNATTO [COLOR], WITH SUNFLOWER LECITHIN ADDED FOR SLICE SEPARATION)