Prepare the couscous according to packet instructions.
Prepare the rest of your ingredients – finely chop the pepper, cut the cucumber and mango into small cubes, halve the grapes, drain and rinse the chickpeas.
Once the couscous is ready, stir in the pepper, cucumber, mango, grapes and chickpeas.
Whisk together the olive oil and orange juice, then pour over the couscous and stir until thoroughly combined. Grind over some black pepper to taste (optional).
Serve immediately, or cool completely and chill in the fridge ready to pack in a lunch box.