Born in Kinshasa, DR Congo, Manasse moved to England aged two.
A strong and composed striker, he joined Everton's Academy at Under-16 level.
The forward enjoyed a standout season for Paul Tait's Under-18 Blues side in 2017/18. He hit 11 goals and chipped in with six assists in 18 appearances in the U18 Premier League.
Mampala, who looks up to compatriot Yannick Bolasie, signed his professional deal with Everton in July 2018.
Contracted until: June 2019