Frozen aromatic cubes

Choose an aromatic vegetable, one used often or one about to go bad.

Prepare it: dice, mince or blend.

Freeze in ice cube trays or flat in a freezer bag.

Use from frozen wherever aromatics play a supporting role; aim to use within about three months.

Garlic and ginger paste: grind garlic and ginger in a mortar and pestle and transfer to the tray.

Mirepoix: blend carrot, celery and onion instead of chopping; fill tray cubes and lay the rest flat in a freezer bag.

Cajun holy trinity: bell pepper, onion and celery, frozen the same way.