Step 1: In a mixing bowl, combine 1 cup of oatmeal with 1 cup of boiling water. Stir well and let it sit for about 30 minutes.
Step 2: In a separate bowl, mix the warm water with 2 teaspoons of dry active yeast. Allow it to sit for about 5-10 minutes until frothy.
Step 3: Add the oat mixture to the yeast mixture. Stir in 2 tablespoons of brown sugar and 1 teaspoon of salt. Gradually incorporate 2 cups of all-purpose flour.
Step 4: Turn the dough out onto a floured surface and knead for about 8-10 minutes.
Step 5: Scatter the butter pieces over the dough, fold it over, and knead until smooth.
Step 6: Lightly grease a bowl, place the dough inside, cover with a towel, and let it rise for about 1-1.5 hours.
Step 7: Once risen, punch down the dough, shape it into a loaf, and place it in a greased loaf pan.
Step 8: Cover with a towel and let it rise for another 30-45 minutes.
Step 9: Preheat your oven to 350°F (175°C).
Step 10: Bake for about 30-35 minutes until golden brown and sounds hollow when tapped.
Step 11: Let it cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.