I would normally agree with peas but grew sugar snap this year and they were straight from plant to pot no problem and delicious. Just a couple of small rows kept us in peas for 2 months.
Snowball turnip - I agree slug magnets, but Milan purple seem fine, faster growing, no slugs and taste just as good
Carrots. Constant battle with slugs and carrot fly for veg that are abundant as organic carrots in the supermarket - taste better too!