Duck with Blackberry Sauce and Celeriac Mash

Name: Duck with Blackberry Sauce and Celeriac Mash
Prep time: 15 min
Total time: 15 min
Yield: 4 porties
Cuisine: Belgian
Ingredients: duck breasts, skin on; fine sea salt; ground black pepper; fresh blackberries; caster sugar; celeriac; water; unsalted butter; fine sea salt