Place the chicken stock back into a large saucepan. On medium heat, add the diced onion, the bags of mulukihya (you don't need to thaw them), the ground coriander, mixed or seven spices, and a big pinch of salt and pepper.
Add the ice cube (optional), and return the shredded chicken to the pot and bring mixture to a simmer. Simmer for five minute or so until mulukihya has completely melted and warmed through, and is just about to come to a boil. Don't let it boil, or it'll turn slimy.
While mulukihya is simmering, place olive oil in a skillet, and heat on medium. Add the chopped coriander and crushed garlic, and sauté for a couple minutes until garlic just turns light golden brown. Add this mixture to the mulukhiya stew, and stir through. Taste for seasoning and adjust.
If you like the mulukhiya thinner, you can add a little more broth. Serve with rice, and lemon juice on the side.