Fish in a spicy red sauce

Preparation

• In a saucepan, heat the oil.
  Add the onion, chili flakes and salt.
  Saute until the onion softens.
  Add the tomato paste diluted in 3 tbsp water
  Continue cooking until the onion becomes soft, transparent and mushy. ( about 8 minutes)
  Add 1/2 cup water and let it boil.
  When it boils, add the fish and cook over medium heat for 15 to 20 minutes.
  Remove from heat and serve.