Mirallas proved the matchwinner on Saturday against Stoke City.
Osman said: "Kevin can light up a game at times. It's important that we try and get him in the game as much as possible.
"You might get 20 minutes when he's not in the game, but when he is we all know what he can produce.
"He's certainly showed he's got the quality.
"At times he's been a real plus for us the way he goes about his job and the skill he's got. It's vital we try and keep him out there more.
"We need to get more games in him and more minutes in those games."