Preheat oven to 350 °F degrees
In a stand mixer beat softened butter and brown sugar until fluffy and well combined. If you don't have spreadable butter at rom temp, place the butter bar in the microwave for 5 seconds at a time, until it's soft and easily spreads but is not melted)
Add in sour cream and vanilla, mix well.
Place the eggs in a small dish and slightly beat to break up the yolks. Add in eggs to mixer and beat well after addition.
Chop prunes, walnuts and persimmons into small chunks. Fold them into wet ingredients with a spatula.
Combine dry ingredients in a separate bowl. Add in flour as well as all spices, salt and baking soda
Using a spatula, slowly combine dry ingredients into wet ingredients folding mixture until well incorporated. (don't over mix)
Grease a loaf pan with some butter, nonstick spray or line with parchment paper
Add batter to the pan and spread evenly, lightly score the center with a kitchen knife.
There's a couple of ways to garnish the bread. You can place persimmon slices right through the top center and a few small prune pieces scattered over the top (Its important that garnish slices are very thin so the bread can bake evenly) OR just keep it simple and finely chop a handful of walnuts and sprinkle it on top.
Bake for about an hour (60 minutes) at 350 degrees Fahrenheit. To check insert a wood toothpick in the center of the loaf if it comes out clean with no crumbs attached it is thoroughly baked
Wait for the bread to cool before slicing and enjoy!