Ingredients
- 1 tbsp olive oil
- ½ onion, diced
- ½ leek, diced
- 1 carrot, diced
- 1 small bulb fennel, diced
- 3 garlic cloves, left whole and gently crushed
- About 20 black peppercorns
- 8-10 button mushrooms
- 1 stick celery, diced
- 3 tomatoes, diced
- 3-4 fresh parsley stalks, roughly torn
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