rognon de boeuf

https://www.youtube.com/watch?v=7z5M2eVK_sk Ingredients Recipe for 4 people. 600 g of beef kidneys 2 tbsp of old-fashioned mustard 20 g of butter 5 cl of white wine 3 cl of neutral oil Salt and pepper (to taste) 30 cl of cream Utensils Frying pan Knife Spatula Ruler (for measuring) Tablespoon…