Stir the turkey, cooked quinoa, onions, tomato paste, hot sauce, 2 tablespoons Worcestershire, egg, salt, and pepper in a large bowl until well combined. The mixture will be very moist. Shape into a loaf on a foil lined baking sheet. Combine the brown sugar, 2 teaspoons Worcestershire, and 1 teaspoon water in a small bowl. Rub the paste over the top of the meatloaf.