To bloom the saffron, grind the saffron threads using a pestle and mortar, or crush them with the bottom of a glass on a plate.
Transfer the ice cubes to a small bowl and sprinkle the ground saffron over them.
Set it aside in a warm place until you need it.
Put a Dutch oven or a heavy-based pan on medium heat.
Add half of the olive oil and sear the chicken pieces until slightly browned, set them aside on a plate.
Add the rest of the olive oil to the same pan and sauté sliced onions along with peppers until soft.
Stir in the tomato paste, turmeric, freshly ground black pepper, and salt, and sauté for another minute.
Pour in the 1 ½ cups of water, lemon juice, and half of the bloomed saffron. Give it a good stir and bring the pan to a boil.
Put the chicken pieces back into the pan, reduce the heat to low, and cover with the lid.
Let it simmer gently for 40 minutes, or until the chicken becomes fork-tender.
When chicken pieces are cooked, transfer them to a serving dish and keep them warm.