1garlic clovelarge, minced and mashed into a paste with 1/4 tsp salt
1/2cupfresh mintfinely chopped
1bunch arugularocket (stems discarded and leaves washed well, spun dry and chopped)
2cupsvine ripened cherry tomatoeshalved
In a small saucepan simmer lentils in water to cover by 2 inches until tender but not falling apart, 15 to 20 minutes, and drain well. Transfer hot lentils to a bowl and stir in 1 tablespoon vinegar and salt and pepper to taste. Cool lentils completely, stirring occasionally.
In a saucepan bring water to a boil and add couscous and salt. Remove pan from heat and let couscous stand, covered, 5 minutes. Fluff couscous with a fork and transfer to a large bowl. Stir in 1 tablespoon oil and cool completely, stirring occasionally.
In a small bowl whisk together garlic paste, remaining 2 tablespoons vinegar, remaining 3 tablespoons oil, and salt and pepper to taste. Stir lentils and dressing into couscous. Chill salad, covered, at least 3 hours and up to 24.
Just before serving, stir in remaining ingredients and season with salt and pepper.