I'm glad you found a recipe for streusel since I can't really help you with that. The streusel topping will make the bread more dense and might brown faster than the bread itself. Tent it with foil if that happens.
I haven't tested this recipe yet but I eventually will. I'm assuming you're not new to bread baking, so I'll just keep the instructions as concise as possible.
The recipe is a modified from the cinnamon raisin bread in the
Bread Baker's Apprentice. I've made this a few times and it seems to match your description and closely resembles the ingredient list.
Apple Scrapple Hack
for two 1 - 1.5 lb boules
Ingredients
16 oz Bread or AP Flour (King Arthur is unbleached and unbromated)
1 oz brown sugar
1 to 1.5 t salt
3 t instant yeast
1 t cinnamon
1/4 t nutmeg
1 large beaten egg
1 oz melted butter (room temp)
6 oz unsweetened applesauce (room temp)
4 oz water (room temp)
1 t vanilla
5 oz diced apples
Streusel recipe of your choice
Instructions
Mixing:
- mix flour, brown sugar, salt, yeast, cinnamon, and nutmeg in a bowl
- add egg, butter, applesauce, water, and vanilla
- mix until it forms a ball
Knead:
- 10 minutes
- dough should be pliable and slightly sticky (adjust with more flour and water if needed)
- add apples towards the end and knead gently until evenly distributed
Bulk Ferment:
- until doubled (2 hrs at room temp?)
Divide/Preshape:
- 2 even pieces (weigh if you have a scale)
- preshape into rough balls
Rest:
- 5 minutes (to make final shaping easier)
Shape:
Boules (maintain high surface tension!)
Helpful video here.
Apply Streusel:
(add the streusel after the final proof and you risk degassing the dough)
Final proof:
seam side up, streusel underneath in a bowl
until almost doubled (90 minutes at room temp?)
Bake:
transfer to sheet pan or peel/baking stone VERY GENTLY
350 F 40 to 50 minutes (rotate halfway through)
until 195F in the center
I'll be glad to clarify anything, of course.