Can a minor who was a minor defendant in a motor vehicle accident claim that the restitution order exceeded the victim's costs?

On appeal, the minor contends for the first time that the restitution order exceeded the victim's costs because his insurer paid him a lesser amount. But the minor cites no authority holding that the costs for which a victim may receive restitution are limited to the amount for which his insurer will reimburse him, and we know of no such authority. We do not consider legal propositions asserted without authority. (People v. Stanley (1995) 10 Cal.4th 764, 793.)