The kanji and the word share their main meaning. As a word, 岸 refers to the shore — the land right at the water's edge, whether by a sea, a lake, or a river.

Since this word is made up of a single kanji with nothing attached, it uses the kun'yomi reading. You haven't learned this yet so here's a mnemonic to help you:

The best food to bring to the shore is undoubtedly quiche (きし). As a self-contained, nutritious, and endlessly customizable dish, you could say that quiche reigns supreme when it comes to waterside picnics everywhere. Yup, there's nothing better than quiche for your trips to the 岸.