Which food has less impact on blood sugar?

FULLY COOKED OVEN ROASTED CHICKEN BREAST BROWNED IN OIL (CHICKEN BREAST, WATER, SALT, DEXTROSE, SODIUM PHOSPHATE [PRESERVATIVE]), SANDWICH ROLL (WHEAT FLOUR, WATER, SUGAR, SALT, CANOLA OIL, YEAST, GUAR GUM, RYE FLOUR, MALTED BARLEY FLOUR, DEACTIVATED YEAST, DEXTROSE, FAVA BEAN FLOUR, MALT EXTRACT, SUNFLOWER LECITHIN, CALCIUM PHOSPHATE, ENZYMES, ASCORBIC ACID, NIACIN, XANTHAN GUM, REDUCED IRON, CALCIUM SULFATE, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), CAESAR DRESSING (SOYBEAN OIL, WATER, PARMESAN CHEESE [PASTEURIZED MILK, CHEESE CULTURE, SALT, ENZYMES, ANTI-CAKING AGENT], CORN VINEGAR, EGGS, CORN SYRUP, SALT, SUGAR, CONTAINS LESS THAN 2% OF CURED ANCHOVIES, SPICES, CITRIC ACID, DEHYDRATED GARLIC, LEMON JUICE CONCENTRATE, NATURAL FLAVOR, XANTHAN GUM, DEHYDRATED ONION, DEFATTED SOY FLOUR, SODIUM BENZOATE [A PRESERVATIVE], DISTILLED VINEGAR, CALCIUM DISODIUM EDTA ADDED TO PROTECT FLAVOR, CARAMEL COLOR, EXTRACTIVES OF TURMERIC), PROVOLONE CHEESE WITH SMOKE FLAVOR (PROVOLONE CHEESE [PASTEURIZED MILK, CHEESE CULTURES, SALT, ENZYMES, NATURAL SMOKE FLAVOR]), GREEN LEAF LETTUCE, UNCURED BACON (PORK, WATER, SALT, SUGAR, CULTURED CELERY POWDER, NATURAL FLAVORING).