1. Cook the couscous according to the package instructions.
2. Let the couscous cool in a salad bowl.
3. Peel and chop the garlic.
4. Clean and cut the cucumber into pieces.
5. Crumble the crab meat.
6. Mix olive oil, lemon juice, salt, and pepper in a container.
7. Add the cooked couscous, cucumber, chopped garlic, and crab meat, then mix well.
8. Serve on plates and top with spoonfuls of mayonnaise.
9. Enjoy immediately.