For the Marinated Steak:

• 1 pound flank steak or sirloin steak
• 2 tablespoons olive oil
• 2 tablespoons balsamic vinegar
• 1 clove garlic, minced or grated
• 1 teaspoon Dijon mustard
• 1 teaspoon salt
• 1/4 teaspoon black pepper

For the Couscous:

• 1 1/4 cup water or broth
• 1/2 teaspoon salt
• 2 teaspoons olive oil
• 1 cup dry couscous

For Assembly:

• 1 cup hummus
• 1 head romaine lettuce, roughly chopped
• 1 tomato, sliced
• 1/2 English cucumber, halved and sliced
• 1/2 red onion, thinly sliced
• 1/2 cup kalamata olives (optional)
• 2 tablespoons olive oil
• 1 lemon, juiced
• 1/4 cup feta cheese, crumbled
• Fresh parsley, roughly chopped, to serve