Shrimp with Couscous

INGREDIENTS

• 2 tablespoons olive oil
• 1 1/2 pounds medium shrimp, shelled and deveined
• Coarse salt and ground pepper, for seasoning
• 1 teaspoon mustard seeds
• 2 leeks, sliced into 1/2-inch half-moons
• 2 carrots, shredded
• 5 cloves garlic, thinly sliced
• 1 cup couscous
• 1 cup frozen peas, thawed