The winger has featured six times already this term, including three substitute appearances in the Premier League and his sole start in the Capital One Cup was capped by a fantastic goal in our 3-0 win at Carlisle.
Andros, 21, is now after his first England Under-21 cap in the European U21 Championship play-off against Serbia having represented his country at Under-17 and Under-19 level.
The first leg is at Norwich's Carrow Road on Friday night (6pm) before the return in Serbia on Tuesday - the winners qualify for next summer's finals in Israel.
"From the first moment this season, he’s tried to fight for a place in the team," said Steffen.
"Can you imagine, as 21 year-old, you have in front of you Gareth Bale, one of the best wingers around?
"Andros keeps going, he trains well, he’s always there if you need him, always strong, creates something, he played fantastic at Carlisle and scored as well.
"Now he’s with the Under-21s and that’s great for him to be involved in two big games against Serbia.
"It’s fantastic to work with Andros because he likes to improve and I think over the next few years, he’ll be one of the biggest talents in England."