Cauliflower "Fried Rice" with Chicken

boneless, skinless chicken breast, cut into bite sized pieces

medium head cauliflower

large egg

cooking oil, divided

medium onion (, chopped)

garlic (, minced)

diced frozen or fresh carrots

frozen peas

soy sauce *for gluten-free use tamari

sesame oil

fresh cracked black pepper

green onions (, diced)

optional: kosher salt

more optional vegetables: kale (, celery, broccoli, corn, spinach)

more options: shrimp (, pork and beef)