Which food has less impact on blood sugar?

FULLY COOKED CHICKEN SHAWARMA SEASONED CHICKEN SLICES (CHICKEN THIGH AND BREAST WITH RIB MEAT, WATER, SEASONING [POTATO STARCH, SPICES, SALT, PAPRIKA, GARLIC POWDER, EXTRACTIVES OF CARROT SPICE EXTRACTIVES], LEMON JUICE CONCENTRATE), LAVASH FLATBREAD (ENRICHED UNBLEACHED WHEAT FLOUR [WHEAT FLOUR, MALTED BARLEY FLOUR NIACIN, IRON, THIAMINE MONONITRATE RIBOFLAVIN, FOLIC ACID], FILTERED WATER, CANOLA OIL, SEA SALT CULTURED WHEAT, OAT FIBER, SUGAR BAKING POWDER [SODIUM ACID PYROPHOSPHATE, POTATO STARCH, SODIUM BICARBONATE], YEAST), TOMATO TZATZIKI SAUCE (SOUR CREAM [CULTURED CREAM], LOW FAT YOGURT [GRADE A PASTEURIZED MILK AND SKIM MILK, KOSHER GELATIN, VITAMIN A PALMITATE, VITAMIN D3 AND CULTURES] CUCUMBER, GARLIC, LEMON JUICE CONCENTRATE POMACE OLIVE OIL [POMACE OLIVE OIL, EXTRA VIRGIN OLIVE OIL], WATER, DILL WEED, XANTHAN GUM) RED ONION, GREEN LEAF LETTUCE, NEUFCHATEL CREAM CHEESE (PASTEURIZED MILK AND CREAM, SKIM MILK, CHEESE CULTURE, SALT, GUAR GUM, CAROB BEAN GUM, XANTHAN GUM) FETA CHEESE (PASTEURIZED MILK, SALT CHEESE CULTURE, ENZYMES, POTATO STARCH [ADDED TO PREVENT CAKING]) KALMATA OLIVES (OLIVES, WATER, SEA SALT, ACIDIFYING AGENT [RED WINE VINEGAR]).