Yes, you can cook feijoas. There are a few recipes out there for cooking feijoas, I've created an awesome feijoa cake recipe that doesn't require many ingredients, and it turns out really moist and flavorful. Prepare and cook them in the same way as you would pears or apples. When using feijoas for cooking peel and dice the flesh. You can even cook and freeze the pulp for use all year round. The feijoa plant is versatile, the fruit can be cooked or used in cocktails, and the flowers can be steeped in hot water to make tea. The wood can be used for smoking foods like pork, poultry, and seafood.