If you are on a raft and don't have a microwave oven, it means that you must use other methods to meet your food needs. In this case, you need to consider the following methods to prepare food:

1. wild fire: Find dry wood and firewood, and make a simple fire for you to barbecue and cook. You can use stones and twigs to make a simple barbecue grill and barbecue with fire. Of course, this requires knowing how to make a fire to ensure safety.

2. Homemade food: It is also a good choice to make your own food by fishing or other wild animals. This method requires some psychological preparation and skills, but you can find fish and wild animals suitable for fishing during the day, so that you won't be too hungry when you are empty.

3. dry food: dry food is also a good choice when there is no microwave oven. For example, dry biscuits, cookies or other dry foods that can be stored for a long time.

4. Use "primitive skills": If you have fresh plants or fruits, you can use sticks or stones to make hammers and chopping boards to extract water or crush ingredients. This will give you more energy.

In today's fast food culture, there is no need for microwave ovens to meet food needs. In order to survive in the wild, we need to prepare and use natural ways to meet our needs. Although these seem simple, they are usually the only limitations of extreme survival in the wild. Like our ancestors, we need clear judgment to achieve long-term survival.