Learn how to make mirepoix—which is a mix of onion, celery, and carrot typically used to start soups and sauces—and store it in the fridge or freezer when you have time, then grab it for easier cooking in the moment.
Dice finely. Add ⅓ cup of each to a freezer bag (remove as much air as possible before sealing) or in an airtight storage container to make 1 cup mirepoix total per portion.
Store in the refrigerator for up to a week or in the freezer for up to 6 months. Use in favorite recipes as desired.
Notes
You can store this vegetable mixture in storage containers in the fridge for up to a week or in freezer bags in the freezer for up to 6 months.
Add 1-2 cloves minced garlic to the mixture if desired.
When freezing, there is often some ice that forms on the vegetables due to their water content, but that's not a big deal or a worry.
When you add frozen mirepiox to a pot or a pan when using, simply sautee for a few minutes to allow the excess moisture to evaporate away.