Preheat oven to 400 degrees F.
Lightly oil a baking sheet or coat with nonstick spray.
Using your fingers, work the brown sugar, about 1 teaspoon per thigh, onto both sides of the chicken.
Place chicken, potatoes and carrots in a single layer onto the prepared baking sheet.
Drizzle with olive oil and sprinkle with Ranch Seasoning and garlic; season with salt and pepper, to taste.
Place into oven and roast until the chicken is completely cooked through, reaching an internal temperature of 165 degrees F, about 25-30 minutes.
Then broil for 2-3 minutes, or until caramelized and slightly charred.
Serve immediately, garnished with parsley, if desired.