shrimp, well cleaned and peeled (about 1.2 kg) • freshly squeezed orange juice (240 ml) • ketchup (240 ml) • tamarind concentrate (240 ml) • garlic • Roasted dried árbol chiles, to taste • roasted green chile • chicken bouillon • chopped fresh pineapple or canned pineapple in syrup (about 75 grams) • Black pepper, to taste • butter