The young forward completed a move to Goodison Park on Thursday.
The young forward completed a move to Goodison Park on Thursday from Swiss side Grasshopper Club Zurich.
He will now spend the rest of the season on loan at his former club before moving to England permanently in the summer.
Tarashaj is the latest of several youngsters to be signed by manager Martinez in recent seasons and the 20-year-old says the Spaniard's record of developing young talent was a key factor behind his move.
"For me that is the best thing about Mr Martinez wanting me - his belief in young players," he told evertonfc.com.
"I heard that he was a good manager and works well with young players individually - this is what I want to make me a better player.
"English football is fast-paced and Everton is a big club with a good manager in Mr Martinez."
Tarashaj will no doubt hope he can join the ranks of youngsters to have impressed under Martinez.
Several of those are already in the first team, with Ross Barkley, Gerard Deulofeu and John Stones all regular starters under the Spaniard.
This season has also seen the development of Brendan Galloway, with the youngster having impressed while Leighton Baines was out through injury.
Others, such as Tyias Browning, have been given their chance to impress on occasion.