I agree with the obvious cheese + pork big bear bangers, but those are absolutely not needed up to like 700-1k stats, although they are probably quite low effort compared to others once you have the production setup (other than feeding a metric shitton of animals lol)
Go onto
https://food.cediner.tech/ and you can search through public recipes, but overall it's pan-seared fish from angler, big bear bangers from boar, a lot of other sausage also give str even if +1, autumn steaks/meat in jelly from bear/wolf should give str too, dried angler meat, a lot of normal meat/fish roasted with high quality salt also can go up to like 20-30 feps of basically pure str. There is probably some baked recipes that are okay for str, you should look through the availble options. Overall this world eating, other than the endgame op foods, is eating a bunch of 20-30 fep foods in combination to take advantage of variety.