Add butter to a 2 quart saucepan over medium-high heat. Pour-in the couscous and sauté for 4 - 5 minutes, or until the couscous has a light brown color. Add the chicken stock and bring to a boil. Cover, and cook for roughly 15 minutes or until the liquid is absorbed.
Meanwhile, prepare the spinach, mozzarella, salami, and tomatoes. Then whisk together all ingredients for the creamy dressing. Set aside.
Once the couscous is cooked, pour into a large bowl and combine all of the ingredients for the salad. Drizzle over with the dressing and toss to combine. Serve immediately with crumbled crackers on top. Note: if making this ahead of time or for meal prep, keep the crackers separated until you’re ready to enjoy.