Preheat oven to 350 F. Butter or line an 8″ x 4″ x 3-inch loaf pan with parchment paper. Set aside.
Peel oranges thinly & finely chop peel. Boil with sugar & water for 10 minutes: cool. Pour into a large bowl & add egg & butter.
In a small bowl, combine flour, salt & baking powder. Add dry mixture to wet mixture alternately with milk.
Pour batter into prepared loaf pan. Top with dollops of strawberry preserve. Using the handle of a wooden spoon, swirl preserve into batter making sure not to over stir so it creates a marbled effect.
Bake for about 45 minutes or until bread tests done. Remove from oven & cool on wire rack. As I mentioned in the blog, the bread tastes better the second day if you can wait that long to try it.