Prepare the vegetables: finely chop the onion and mince the garlic; chop the sweet potatoes, carrots, broccolini/broccoli, and zucchini into bite-sized pieces.
Heat 2 tablespoons of avocado oil in a very large skillet over medium-high heat.
Add the chopped onion, minced garlic, sweet potatoes, and carrots to the skillet and stir to combine.
Add the chopped broccolini or broccoli and stir well, then add half of the spices and half of the sea salt and mix to coat the vegetables.
Add the chopped zucchini and stir to combine.
Cover the skillet and cook the vegetables for 5 minutes, then remove the cover, stir, and cook an additional 3 minutes; test a sweet potato piece for doneness and cook longer if needed.
Meanwhile, heat 1 tablespoon of avocado oil in a separate large pot or Dutch oven over medium-high heat.
Add the chopped raw chicken to the hot pot, sprinkle with the remaining spices, sea salt, and black pepper, and let the chicken sit undisturbed for 3 minutes to brown.
Stir the chicken, cover, and cook until cooked through, about 8 minutes; remove the cover and drain any excess liquid.
Portion the cooked chicken and vegetables into meal-prep containers using your preferred portions.