In a small bowl, combine the warm milk, sugar, and active dry yeast. Stir gently and let the mixture sit for 5-10 minutes until it becomes frothy, indicating the yeast is active.
In a large mixing bowl, whisk together the all-purpose flour and salt. Create a well in the center of the dry ingredients and pour in the activated yeast mixture along with the melted butter.
Using a wooden spoon or your hands, mix the ingredients until a sticky dough begins to form. Transfer the dough to a floured work surface.
Knead the dough for approximately 8-10 minutes, adding flour as needed, until it is smooth, elastic, and springs back when poked.
Shape the kneaded dough into a ball and place it in a greased bowl, ensuring it's coated with a thin layer of oil. Cover the bowl with a clean cloth and allow it to rise in a warm environment for about 1 hour, or until it has doubled in size.
After the dough has risen, gently punch it down to release the air. Roll it out on a floured surface into a rectangle measuring approximately 12x18 inches.
Evenly sprinkle the garlic powder and dried oregano over the surface of the dough, followed by a generous layer of the mozzarella and cheddar cheese, leaving about a half-inch border around the edges.
Starting from one long side, tightly roll the dough into a log shape. Once rolled, slice the log into 1-inch thick rounds.
Arrange the dough slices in a greased loaf pan, standing upright to create the pull-apart effect. The slices should touch each other for the best results.
Cover the loaf pan with a cloth and let it rise again for an additional 30 minutes in a warm spot.
Preheat your oven to 350°F (175°C) while the dough is rising.
Once the dough has risen, gently brush the top with olive oil and sprinkle the chopped parsley over it for added flavor and color.
Place the loaf pan in the preheated oven and bake for 25-30 minutes, or until the bread is golden brown and cooked through.
Once baked, remove from the oven and allow it to cool slightly in the pan for a few minutes. Then, carefully pull apart the pieces and serve warm.
Notes
Serve directly in the loaf pan with a side of marinara sauce for dipping.