Wash, dry and peel the veggies.
Dice the veg: finely dice onion, carrot, and celery usng a 2:1:1 ratio heavy on onion.
Heat the oil: warm olive oil over medium-low heat in a heavy skillet or pot.
Add vegetables: stir in the onion,carrot, and celery.
Season: add a pinch of salt to help draw out moisture.
Slow cook: sauté 10–15 minutes, stirring often, until softenedand fragrant.
Do not brown unless the recipe calls for it.
Use immediately as the base for sauces, soups, stews, or risotto. Or freeze it for later use.