In a medium bowl, whisk the sourdough discard with water. Then add honey/maple, oil and instant yeast.
In a large bowl, add both types of flour and sea salt. Pour the liquid ingredients over top and start to mix everything together.
Once the bread dough starts to form, turn it out on a floured surface. Knead the dough for about 15 mins by hand until stretchy and elastic. If you have a stand mixer and dough hook you can try that for 5 mins instead.
Add the dough ball to an oiled bowl. Cover and let rise until doubled (about an hour). I use my oven (off) with the oven light on.
Line loaf pan with parchment paper.
After rising, turn the dough out on the counter. Flatten gently into a rectangle with your hands, then fold over 1/3 from the left, then 1/3 the right. Now roll the dough up tightly from the bottom to form a loaf shape. Tuck under the ends slightly and pinch the seams where you see them. Seams should be on the bottom and the top should have some tension but not ripping. Note: I am not amazing at loaf shaping and mine always turn out fine. Don't stress over this step.
Place the dough loaf in the pan. Cover the loaf lightly with a towel and let rise for 1 hour. Notes: Here is where I set the loaf on top of the stove while my oven preheats. They get a good second rise that way.
Preheat the oven to 350°F. Make 3 diagonal cuts across the top about 1/2 inch deep with a sharp blade (I dip mine in cold water before cutting). Then place the loaf in the oven and bake for about 40 minutes until it looks golden brown and sounds hollow. You can check the internal temp with a thermometer too. I prefer this method. 180-200°F is done.
Remove from pan let cool completely before slicing.
If I am not going to need this loaf any time soon (within the next week), I will slice it completely and store it in the freezer in an airtight container. Toasting the frozen slices as needed is perfect and tastes great!