Ina's Apple Pie Bars | Easier Than Apple Pie!

Name: Ina's Apple Pie Bars - Easier Than Apple Pie
Prep time: 45 min
Cook time: 45 min
Total time: 1 h 30 min
Yield: 9
Ingredients: 3 lbs Apples; 1 tbsp Lemon juice, fresh; 2 cups All-purpose flour; 1/4 cup Brown sugar, lightly packed light; 2 1/2 tsp Cinnamon, ground; 1 tsp Cornstarch; 1/2 cup Granulated sugar; 3/4 tsp Kosher salt; 1/2 tsp Nutmeg; 1 tsp Vanilla extract, pure; 1/3 cup Walnuts; 1 1/8 cup Butter, unsalted