Preheat oven 450ºF.

In a medium glass or metal bowl, combine couscous with salt and olive oil. Pour boiling water over couscous. Stir and cover bowl tightly with plastic wrap. Set aside for 15 minutes. Remove plastic wrap, separate the grains with a fork, and let cool.

Meanwhile, in a large baking pan, combine grapes, brown sugar, and honey mixture. Sprinkle with vinegar and black pepper. Bake for 10 minutes. Let cool.

Toss couscous with grapes and pan juices. Add herbs and garlic and very gently combine. Taste and add salt and olive oil, if needed.