Peel the onion and halve.

Trim the celery.

Peel the carrots.

Fit the Dicing attachment to the slow speed outlet of the machine.

Place a large mixing bowl under the dicing attachment.

Start the machine on speed 1.

Dice Ingredients 1 (onions, celery, carrots) into the mixing bowl using the dicing pusher.

Add Ingredients 2 (butter, oil) into a large frying pan.

Transfer vegetables into the frying pan.

Gently sauté over a low heat for about 45 minutes until soft and golden.

Serve with stews, soups or pasta.