2 tablespoons corn oil
1/4 medium onion, finely chopped
2 green serrano chiles (or to taste), seeded and thinly sliced
2 medium tomatoes, peeled and finely chopped
9 oz (250 g) cocktail (or fresh) shrimp, peeled and cleaned
3 sprigs cilantro
Sea salt
8 4 1⁄3-inch (11 cm) corn tortillas |