"To add the apples" means to include or put the apples into something such as a recipe or mixture.
Sentences with «to add the apples»
Top one piece of bread with half of the cheese then add apple slices before topping with remaining cheese and second piece of bread. (thelemonbowl.com)
Add the apple slices in a single layer and sprinkle with a pinch of salt. (mygourmetconnection.com)
Prepare the vinaigrette by adding the apple cider vinegar and salt to the blender, and blend while slowly adding the olive oil. (vegan-magazine.com)