Mix 2 cups of flour, sugar, yeast and in a big mixing bowl.
Microwave milk, water and butter (4 tbsp.) until it’s almost melted. About 1:30 minutes)
Mix the egg into the milk mixture.
Add the wet ingredients into dry ingredients and mix until incorporated.
Add one more cup of flour and a bit more so the dough forms into a ball.
Knead for 7 minutes.
Cover the bowl with plastic wrap and a towel. Let the dough rise for 25 minutes.
Coat one big baking pan or 2-3 smaller ones with non-stick spray.
After 25 minutes, roll out the dough into a big rectangle, not so thick and not so thin.
Spread the butter all over the dough up to the edges.
Mix apples with cinnamon.
Spread brown sugar, apples and more cinnamon if desired.
Roll the dough and cut it in half, and each half into half and again into half. You will have 16 pieces.
Place the rolls in the pan/pans.
Cover loosely with a towel and let the rolls rise for 45 minutes.
After 30 minutes preheat the oven to 180C or 350F.
Bake the rolls for 25-30 minutes.