New dessert in 10 minutes, no oven, no condensed milk, no gelatin, no egg. it drives the world crazy

Ingredients: desiccated coconut (amount depends on the tray you are going to use) 4 cups of milk (1 liter) 3/4 cups of sugar (170g) 1 and 3/4 cups of all purpose flour (200g) 7g of vanilla sugar 1/4 cup of butter (60g) 1 cup of whipping cream 35% (250ml) 2 tbsp of sugar (25g) 1/2 cup of walnuts (50g) some walnuts halves for garnish