Hardy netted two instinctive finishes to send the under-23 side on their way to a 5-0 win over Southampton in their Premier League 2 clash at Kirkby on Monday evening.
They were the 21-year-old's first goals since arriving from Brentford for an undisclosed fee earlier in the month.
"Joe has shown what he is about," he said to the Liverpool Echo. "He is a goalscorer, he can finish, and he has shown that in training.
"He will be a useful asset for us this season as maybe in some of the games this season where we have dominated, we have not scored the goals our play has warranted.
"We know if we give the ball to Joe near to goal, there's a good chance of him scoring.
"It was great for him to get off the mark. He was gutted to go off (Hardy was replaced midway through the second half) as he wanted his hat-trick, but we have plenty of games to come and he is going to be valuable for us."