Mix the butter, brown sugar, vanilla, 1 cup Greek yogurt, and 3 eggs.
Mix in the dry ingredients.
Stir in the finely chopped peaches.
Make the cinnamon crunch with brown sugar, butter, and flour.
Put the batter in a bread pan.
Top with peach jam, the cinnamon crunch, and fresh peach slices.
Bake for about an hour.
Slice while still warm and top with salted butter and flaked sea salt.
