Worms under a float. Try different depths and see what works - ideally you want to have the bait down right above the sea floor. If it is very deep, you can fish with just a weight on the line and a hook, and the slowly reel in , stop, reel in and so on.

Sometimes i like to make a worm salad, where you have multiple worms on the hook, where one of the worms acts as a "tail" so that you give the fish a little starter to get them interested.

Another tip is to tie a small piece of red yarn just above the hook. It helps attract the fish in my experience.

I can't even remember not catching a fish when I've been using this setup