Yes, if you keep the couscous and chickpeas separate from the vegetables. Once the couscous and chickpeas are at room temperature, place in a freezer-safe bag or container. Let out as much air as possible. Freeze for up to 4 months. To reheat, add to a microwave-safe bowl with a couple of tablespoons of water and heat in one-minute increments until warm. Or, allow to thaw in the refrigerator and heat up in a saucepan (along with a little water) over medium-low heat.