Which food has less impact on blood sugar?

ITALIAN SUB ROLL [ENRICHED FLOUR (WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMIN MONONITRATE, RIBOFLAVIN, FOLIC ACID), WATER, HIGH FRUCTOSE CORN SYRUP, YEAST, DEGERMINATED YELLOW CORN MEAL, SOYBEAN OIL, SALT, CALCIUM PROPIONATE (A PRESERVATIVE), MONOGLYCERIDES, WHEAT FLOUR, DATEM, ENZYMES, ASCORBIC ACID (DOUGH CONDITIONER)], HAM WITH NATURAL JUICES [HAM, WATER, SUGAR, SALT, POTASSIUM LACTATE, SODIUM DIACETATE, SODIUM ERYTHORBATE, SODIUM NITRITE, SODIUM PHOSPHATE, CARAMEL COLOR), STONE GROUND MUSTARD MAYO SAUCE [SOYBEAN OIL AND/OR CANOLA OIL STONE GROUND MUSTARD (DISTILLED VINEGAR, WATER, MUSTARD SEEDS, SALT, SPICES), WATER, HONEY, HORSERADISH (GRATED HORSERADISH ROOTS, DISTILLED VINEGAR, WATER, SALT, ORGANIC CORN STARCH), EGG YOLK, DISTILLED VINEGAR, GARLIC, JUICE (GARLIC JUICE, SALT), GINGER, MIRIN (WATER, CORN SYRUP SOLIDS, DEXTROSE DISTILLED VINEGAR, SOY SAUCE (WATER, WHEAT, SOYBEANS, SALT, ALCOHOL), MIRIN [WATER, RICE, ALCOHOL, SALT, ENZYME, KOJI]), NATURAL FLAVORS, SALT, SOY SAUCE [WATER, WHEAT, SOYBEANS, SALT, ALCOHOL, VINEGAR, LACTIC ACID), SPICES, SUGAR, XANTHAN GUM], SWISS CHEESE [PASTEURIZED PART-SKIM MILK, CHEESE CULTURE, SALT, ENZYMES], GREEN LEAF LETTUCE