SOLVED. Children Fantasy book about an orphan who goes into a magical world where he finds his father and tasked to fight evil or someone evil to save the world. [s]

[Ayo]

I don't remember much about the plot but I remember elements, at one point the kid is imprisoned in a call and somehow gets a magical spoon that never runs out of food. I remember something about a tower, he possibly had a sword too and maybe a horse or horse-like creature that flies.

[Becca]

Mio, My Son by Astrid Lindgren? It has a flying horse and a spoon that magically fills itself.

[Ayo]

Yes, thank you! That's the one!