Roberto Baronio scored twice and also produced an assist.
“I am pleased, the lads did well," said Mihajlovic.
“We have many experienced players who can help the younger players to mature and that is what I see happening."
Former Hearts fullback Aaron Hickey was handed a debut by Mihajlovic.
The coach added: "Hickey doesn't speak Italian yet, but he's a young lad with quality and he did well this evening."