Story of Seasons: Friends of Mineral Town is all about making food. You can choose to sell the food to make some cold hard cash to improve your farm, or you can opt to keep it for yourself and make recipes with it. This is very important, and food is a great source of energy and if you plan on mining a lot, and getting to the deepest levels. The issue is that you cannot store food in your cabinet, and will need to get your hands on a fridge.
To get a fridge in Story of Seasons: Friends of Mineral Town, you will need to visit Gotts Workshop, show on the map below. Gott is a very useful character, and he can expand upon your house and farm, as long as you have the lumber and stone to get the job done, and the gold to pay him for his services.
To get a fridge, you will first need to upgrade to the Slightly Bigger House, as you can only get a fridge when you have a kitchen to put it in. You will need 150 Lumber, and 50 Stone to purchase the Slightly Bigger House upgrade, and this upgrade comes with a kitchen. You will also need 3000 Gold, and it will take Gotts three days to finish the project.
Once you have the kitchen, you can then purchase the fridge from Gotts, with an option to upgrade it to a bigger fridge later in the game.