Prepare the Dough:

• In a large bowl, warm the milk to 110°F (45°C). Sprinkle the yeast over the warm milk and let it sit for about 5-10 minutes until it becomes frothy.
• Add sugar, eggs, melted butter, and salt to the yeast mixture. Mix until well combined.
• Gradually add the flour, one cup at a time, until the dough comes together. Knead the dough on a lightly floured surface or use a stand mixer with a dough hook for about 5-7 minutes until it becomes smooth and elastic.
• Place the dough in a greased bowl, cover it with a damp cloth, and let it rise in a warm place for about 1 hour or until it doubles in size.

Prepare the Filling:

• In a small saucepan, cook the diced apples over medium heat until they are tender, about 5-7 minutes. Remove from heat and let cool.
• In a small bowl, combine brown sugar and cinnamon.
• Roll out the dough on a lightly floured surface into a 16x21-inch rectangle.
• Spread the softened butter evenly over the dough. Sprinkle the cinnamon-sugar mixture evenly over the buttered dough. Distribute the cooled apples evenly over the cinnamon-sugar mixture.

Shape and Bake the Rolls:

• Starting from the long edge, tightly roll the dough into a log. Cut the log into 12 equal slices using a knife or dental floss.
• Place the rolls in a greased 9x13-inch baking dish. Cover with a damp cloth and let them rise for another 30 minutes.
• Preheat the oven to 375°F (190°C). Bake the rolls for 20-25 minutes or until they are golden brown.

Prepare the Frosting:

• In a medium bowl, beat the softened butter, powdered sugar, cream cheese, vanilla extract, and salt until smooth and creamy.
• Spread the frosting over the warm rolls before serving.