In a large bowl, mix together whole wheat flour, oats, brown sugar, melted butter and pumpkin. Stir in the yeast. Add in the flour and add in enough water to create a tacky but not sticky dough. What does that mean? The dough doesn’t stick to your finger when you touch it, but there is still a stickiness to the dough. Knead the dough until it comes together and is smooth and elastic, about 10 minutes by hand or 7 minutes with a stand mixer and dough hook.