Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Pat the chicken legs thoroughly dry with paper towels to ensure the skin achieves a perfect golden crisp.
Slice the zucchini into half-inch thick rounds and peel the carrots before cutting them into similar sized coins.
In a large mixing bowl, combine the chicken legs, zucchini, and carrots with the olive oil, sea salt, black pepper, oregano, and garlic powder.
Toss everything together until the chicken and vegetables are evenly coated in the oil and spices.
Arrange the ingredients in a single layer on the prepared baking sheet, making sure not to crowd the chicken so it roasts rather than steams.
Roast for 30 to 35 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and lightly browned.
Remove from the oven and let the chicken rest for 5 minutes to allow the juices to redistribute before serving.