Apple Honey Challah

Name: Apple Honey Challah
Prep time: 3 h 20 min
Cook time: 50 min
Total time: 4 h 10 min
Cuisine: Middle Eastern
Ingredients: 1 1/2 cups lukewarm water, divided; 1/4 oz active dry yeast ((1 packet)); 1 tsp sugar; 1 large egg; 3 large egg yolks; 3/4 cup honey; 2 tbsp canola oil; 2 tsp vanilla; 2 tsp salt; 5-7 cups flour; 3 medium granny smith apples; 1/4 cup sugar; 2 tbsp turbinado sugar ((optional)); 1 large egg; 1 tbsp cold water; 1/2 tsp salt