The Best Cauliflower Fried Rice {Low Carb!}

Name: The Best Cauliflower Fried Rice {Low Carb!}
Prep time: 5 min
Cook time: 15 min
Total time: 20 min
Cuisine: American
Ingredients: 1 tbsp olive oil; 1 lb frozen raw shrimp, defrosted and de-shelled; Salt & pepper, to taste; 1 tbsp butter; 1 yellow onion, diced; 4 cloves garlic, minced; 4 cups cauliflower rice (or 1 head cauliflower); 3 tbsp low-sodium soy sauce (or tamari if gluten-free or coconut aminos for Whole30); 2 cups mixed frozen vegetables; 1 pinch salt; 1 egg; 4 green onions, sliced; Sesame seeds, for garnish