Brown Butter: Brown butter can burn FAST so keep your heat on medium if it's your first time making brown butter. I like to taste the butter and if it has a slightly nutty, unsweetened caramel flavor it's done! If butter burns or taste like smoke, toss it and try again.
Adding the eggs: It's important that you taste your mixture once you've added all the ingredients so that you can adjust the spices to your liking. If you are nervous about tasting the filling with the raw egg in it then add all the other ingredients except the eggs, taste and adjust your spices and then add the eggs once you are content with the flavor.