Low Carb Jambalaya with Chicken, Shrimp and Sausage

boneless skinless chicken breast halves

olive oil, divided

salt and freshly ground black pepper

Cajun seasoning, preferably salt-free, divided

bag (16-ounce) cauliflower "rice" or "pearls" --OR-- 1 large head cauliflower, grated

large onion, finely chopped

stalks celery, chopped

red bell pepper, chopped

garlic, minced

Hungarian paprika

links Andouille sausage, halved lengthwise and sliced

petite diced tomatoes, undrained

large peeled and deveined shrimp

Tabasco sauce,

chopped fresh parsley, divided