In a large bowl, combine the lukewarm whey and yeast. Stir to combine. Make sure the whey is lukewarm between 100 and 110 F (36.5 to 40.5 C).
2 cups whey, 1 1/2 tsp instant yeast
Add the dry ingredients including both flours and the salt. Mix until fully combined - about 2-3 minutes. The dough will be wet and sticky. Don't add any additional flour or the bread will end up dry.
Cover the bowl with a tea towel or plastic wrap and let the dough rise in a warm place for 1 hour. The dough will rise by about 1/3 during this time.
Preheat the oven to 350F/180C.
Grease a bread loaf tin with light olive oil or line it with parchment paper to prevent the loaf from sticking to the pan or line it which parchment paper. Transfer the dough to the tin. Let it rise for another 30 minutes.
1 tbsp light olive oil
Add the pumpkin seeds on top of the loaf and bake it in the preheated oven for 40 minutes. If the bread is getting too dark during baking, cover the loaf with baking paper.
1/4 cup pumpkin seeds
Remove the bread from the loaf tin after about 10 minutes and let it fully cool on a wire rack before slicing it with a sharp knife.Enjoy!
Notes
Storage: You can store it in a bread bin for 2-3 days at room temperature. Alternatively, you can slice and freeze it for up to 3 months which allows you to defrost individual slices in a toaster.