Rinse the chickpeas in water and let them soak for 12 hours the day before.
In a saucepan of cold water, add the chickpeas and cook for 1.5 hours. Add salt at the end of cooking, drain and let cool.
In a salad bowl, add the chickpeas, haddock fillets, chopped garlic and finely chopped shallot.
Season the salad: Mix together the olive oil, lemon juice, the bouquet of your choice, cumin, and Espelette pepper. Season with salt and pepper.
Check the seasoning and leave to cool.
Add the crushed hazelnuts before serving!