Make the cilantro chimichurri: in a bowl combine the chopped onion, cilantro, jalapeño, olive oil, and TABASCO GREEN PEPPER® SAUCE; season with 1/4 teaspoon kosher salt and 1/4 teaspoon freshly cracked pepper to taste, then set aside.
Prepare the masa dough: in a medium bowl mix 1 cup masa harina with 1/8 teaspoon salt and 2/3 cup water until a soft, pliable dough forms; if it is crumbly add a bit more water, if too sticky add a little more masa.
Divide and rest the dough: divide the dough into eight equal balls, place them on a baking sheet, and cover with a damp towel to prevent drying while you work.
Press or roll the tortillas: place one dough ball between two pieces of parchment or wax paper and press with a tortilla press or the bottom of a heavy pan until flattened, then gently roll with a rolling pin to a 5–6 inch round; carefully peel off and keep covered with a damp towel. Repeat with remaining balls.
Cook the tortillas: heat a griddle or non-stick skillet over medium-high; cook each tortilla in the dry pan 40–60 seconds per side until lightly charred and cooked through, and keep cooked tortillas warm in a low oven while you finish the rest.
Assemble the tacos: spoon the shredded roasted chicken onto each warm tortilla, top with shredded cabbage and a generous spoonful of cilantro chimichurri, then serve immediately.