Instructions

  1. In a medium saucepan mix turmeric in 1 cup water.
  2. Add tuna, and season with salt.
  3. Place over medium-low heat, and bring to a simmer.
  4. Cook for 2 minutes, turning tuna cubes once.
  5. Remove from heat.
  6. Place a large sauté pan over medium heat, and add oil.
  7. When it shimmers, add garlic, ginger and mustard seeds.
  8. Cook for 2 minutes.
  9. Add tomatoes, shallots and chilies; cook for 1 minute.
  10. Add tuna, about 1/3 cup of its cooking water, coconut milk, tamarind and salt to taste.
  11. Stir to dissolve tamarind.
  12. Simmer, covered, until sauce has blended and thickened slightly, 8 to 10 minutes.