Healthy Mongolian Beef with Gluten-Free PF Chang’s Sauce

gluten-free tamari

beef or chicken stock or water

minced fresh ginger

garlic cloves (minced)

red pepper flakes

maple syrup

arrowroot starch (divided)

Sea salt

flank steak (thinly sliced against the grain)

coconut oil (divided)

head broccoli (about 1 pound, cut into small florets)

bunch scallions (white and green parts separated, thinly sliced on the bias)