Tajin/ Tagine: Fish with a Tahini Sauce (Cod or Snapper)

Ingredients:
White fish or red snapper is recommended ( already baked check this link fir a baked oven red snapper:

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1 tbsp of Olive oil
1 sliced medium onion
3 minced garlic cloves
2 tbsp of lemon juice

Tahini sauce:
1/4 cup of tahini
1 lemon juice
1/2 cup of water
1 tsp of white pepper
1 tsp of cumin
Salt to taste
2 tbsp of (Fried or toasted) Almonds