Where are you based Hazel?
Most of the food that Hawaiians ate, they brought with them from the South Pacific.
The main plant staples were sweet potatoes ('uala), breadfruit ('ulu), and bananas (mai'a). Most people wanted taro (kalo), but it was not as easy to cultivate in all areas. Yams (uhi) were also cultivated for food, and during tough times ape (Alocasia) and ti (ki).
For meat, they fished, but also had pigs, chickens, dogs, and if needed, rats.
It was not as easy as going to the grocery store, but if your day is spent just taking care of yourself, farming, fishing, doing crafts, life wasn't so bad.