In a non-stick skillet heat oil over moderately high heat until hot but not smoking and cook onion with salt to taste, stirring, until browned lightly. Reduce heat to moderate. Add garlic paste, curry powder and cook, stirring, until garlic paste is golden. Remove skillet from heat and keep mixture warm.
In a small saucepan bring broth to a boil. Stir in raisins and couscous and let stand, covered, off heat 5 minutes. Fluff couscous with a fork and transfer to a bowl. Stir in onion mixture, mint and salt and pepper to taste.
