Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper for easy cleanup.
Slice the chicken sausage into half-inch rounds and break the cauliflower into small, bite-sized florets.
In a large mixing bowl, combine the sliced sausage, cauliflower florets, and drained chickpeas.
Drizzle the olive oil over the mixture and sprinkle with sea salt, black pepper, garlic powder, and smoked paprika.
Toss everything thoroughly until the ingredients are evenly coated in the oil and spices.
Spread the mixture in a single layer on the prepared sheet pan, ensuring the pieces aren't overcrowded so they can crisp properly.
Roast for 20 to 25 minutes, tossing the ingredients halfway through, until the cauliflower is tender and the sausage is beautifully browned.
Remove from the oven and garnish with freshly chopped parsley before serving warm.