Combine flour, yeast, sugar, coconut milk, eggs, melted butter, and salt in a bowl. Let the dough rise for an hour.
Sauté garlic, onions, lemongrass, ginger, kaffir lime leaves, and red chilies in oil. Add tuna, tamarind paste, salt, and bird’s eye chilies. Cook until done.
Roll out the dough into circles, add filling, fold, and seal. Let them rise for 10 minutes on parchment paper.
Steam for about 10 minutes, then serve with sauce or dip.