STEP 2/6
Stir-fry onion in a pan with butter, stir-fry celery, stir-fry carrots, and when you are out of breath, add tomato paste to make it taste sour
STEP 4/6
Stir-fry 2 vegetables in brown roux, then add brown stock, mix the roux and paste well, add onion filling, bay leaves, and cloves, and simmer
Please be careful not to burn the brown roux and adjust the concentration well