Stewed Stuffed Apples in Syrup (Tufahije)

Name: Stewed Stuffed Apples in Syrup (Tufahije)
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: European
Ingredients: 6 apples (granny smith*); 1/2 lemon (juice only); 2 cups water; 3 cups sugar; 1/2 teaspoon vanilla extract (or 1 teaspoon vanilla sugar); 1 apple (peel only); 2 ounces milk (hot); 5 ounces walnuts (ground); 1.5 ounces butter; 2 tablespoons sugar; whipped cream (in a can, container, or homemade); a few walnut halves (or sour cherries)