You can substitute other leafy greens for the arugula and spinach, such as kale, romaine, or mixed greens.
If you don't have chicken sausage, you can use any type of cooked sausage, such as turkey sausage or chorizo.
You can also add other roasted vegetables to the salad, such as carrots, sweet potatoes, or onions.
For a vegan or vegetarian salad, omit the chicken sausage and add a crumbled hard-boiled egg or some crumbled tofu.