Make the marinade by stirring together the tamarind, honey, garlic, lime and salt. Toss the steak into the marinade and marinate for 2 hours. Grill on high on well oiled grates for 2-4 minutes on each side, depending on thickness. Allow to rest for a few minutes before slicing. Garnish with sliced jalapeƱos, crushed peanuts, cilantro and or green onions.