Mengi, who is only 21 and arrived at Luton in August, helped the club to a vital Premier League win.
On Mengi impressing after getting a chance due to first team injuries, Edwards told reporters: “I'm really pleased for him. I thought he was immense, I thought he was really, really good, in the air he was dominant, in his duels he came out on top.
“He's quick, he's strong, he can play and he can finish as well. He's a really good young player and that's why we got him here.
“He's really proving an excellent acquisition at the moment and the recruitment team deserve a lot of credit for that. “