The length of time you can keep the partially cooked potato mixture with corn flour and spices in the fridge before frying can vary based on a few factors, including the specific ingredients used, the temperature of your fridge, and the overall freshness of the ingredients. However, as a general guideline, it's best to use the mixture within 24 to 48 hours.
If you plan to fry the tater tots beyond that timeframe, it's safer to store them in the freezer instead. Freezing will significantly extend their shelf life, and they can be kept in the freezer for several weeks without compromising quality.
To ensure food safety, always make sure to store the mixture in an airtight container or a sealed plastic bag in the fridge or freezer. When you're ready to fry the tater tots, check for any signs of spoilage, such as off smells or mold, and if in doubt, it's better to discard the mixture and prepare a fresh batch.