Soak saffron in hot water 10 minutes. Place saffron & liquid, garlic, and peppers in blender and puree. Saute in oil, chicken util lightly brown. Remove and keep warm. Reduce hat to low, add garlic paste, stir 2 minutes. Add coriander & oregano, stir 2 minutes. Add tomatoes, cook 3 minutes. Add water and chicken, bring to boil, cover, reduce heat, simmer 20 minutes. Add beans, simmer 15 minutes. Add lemon juice, increase heat, boil 5 minutes. Serve.