There are foods you can get that are fairly good that don't require any farming, and the ingredients are mostly things you'll find during regular game play.

Sausages and Cooked Lox Meat for example.

https://valheim.fandom.com/wiki/Food

Then you could just look up something relatively easy to make or get to go with them.

O and Serpent Stew, if you like hunting serpents it's one of the best foods that's easy to make without any farming.