One of the core game loops in Land of Dreams requires you to feed your bumpkin so they can gain experience (XP). This is achieved by using crops that you have harvested to cook food at one of the following. Better buildings require higher expansion levels before you can craft them.
Fire Pit
Smoothie Shack
Every farm starts with a Firepit so you can cook as soon as you have crops. Additional buildings can be found from the building menu by clicking on the workbench.
Once you click on a building you can choose the recipe that you wish to cook. It will then tell you what the food is, what ingredients it requires, how much XP you will gain and how long it will take to prepare. Once the food is ready you can click on the building to move it from the building into your inventory.
If you click back on the building whilst it's cooking you will see a timer so you know how long you need to wait.
Once the food is in your inventory you can click on your Bumpkin NPC on your farm and feed him.