There are a lot of options if you aren't feeling the chicken breast. As I mentioned in the Recipe ingredients section, you can easily swap boneless skinless chicken thighs for the chicken breast. And you can forego the chicken altogether - try cubes of pork tenderloin, whole peeled and deveined shrimp, or even slices of pre-cooked sausage. If you are using a quicker cooking protein like shrimp, cut the cooking time listed in the recipe so you don't overcook the shrimp. Then remove the cooked shrimp from the pan before sautéing the onion and bell pepper. For a meatless option, try cubes of extra firm tofu!