In a dish, mix together olive oil, Worcestershire, lime juice, garlic, cumin, chili powder, red pepper flakes, salt, pepper, and sugar until combined. Pour half of the marinade into a separate dish. In one dish, place the flank steak, turning it over to coat. In the second dish, place all the veggies, turning to coat. Cover the dishes with plastic wrap and place in the fridge for at least 2 hours.