Coulibiac salmon pie

Name: Coulibiac salmon pie
Prep time: 1 h
Cook time: 2 h 40 min
Total time: 2 h 40 min
Yield: 8 portions
Ingredients: 180 g unsalted butter; 1 tsp sea salt; 360 g plain flour; 90 g cold water; 1 tsp red peppercorns; 1000 g water; 25 g extra virgin olive oil; 4 pinches sea salt; 100 g basmati rice; 3 eggs; 1 onion; 50 g unsalted butter; 200 g button mushrooms; sea salt; ground black pepper; 3 sprigs fresh dill; 900 g fresh boneless salmon fillet; 1 egg; 200 g white wine; 400 g crème fraîche; 1 pinch sea salt; 1 pinch ground black pepper; 4 sprigs fresh dill; 20 g freshly squeezed lemon juice; 4 sprigs fresh parsley