Preheat your oven to 350°F (175°C).
In a mixing bowl, combine the melted butter, milk, eggs, and vanilla extract. Whisk until everything is well blended.
Add the rolled oats, brown sugar, cinnamon, baking powder, salt, grated coconut, and slivered almonds to the wet mixture. Stir briefly until all the ingredients are evenly mixed.
Pour the mixture into a greased or buttered springform pan, smoothing the top with a spatula.
Bake in the preheated oven until the oatmeal is set and the top has a golden brown color.
