Preheat oven to 400°F (200°C) and grease a 9x13 inch casserole dish.
Heat olive oil in a skillet over medium heat. Sauté minced garlic until fragrant, about 1 minute.
Add cauliflower rice and cook 4-5 minutes until moisture evaporates. Let cool slightly.
In a large bowl, mix cauliflower rice, shredded chicken, cream cheese, heavy cream, half of the cheddar cheese, garlic powder, onion powder, Italian seasoning, smoked paprika, chili powder, salt, and pepper. Stir in optional steamed veggies.
Transfer mixture to casserole dish and spread evenly. Sprinkle remaining cheddar cheese on top.
Cover with foil and bake for 30 minutes. Remove foil and bake another 10-15 minutes until bubbly and golden.
Let rest for 5-10 minutes before serving. Garnish with fresh parsley.