Start by peeling and chopping your apples into small cubes. In a large skillet over medium heat, combine the chopped apples with brown sugar, granulated sugar, ground cinnamon, lemon juice, and water. Stir everything together gently until well mixed.
Cook the mixture for about 10 minutes on medium heat until the apples start to soften. Mix cornstarch with a little bit of water in a separate bowl until smooth. Pour this cornstarch mixture into the apple filling while stirring continuously.
Preheat your oven to 350°F (175°C). Cut each flour tortilla into triangles and lay them out on a baking sheet. Spray them lightly with non-stick cooking spray and sprinkle generously with granulated sugar and ground cinnamon. Bake them for about 10 minutes or until they are golden brown and crispy.
Transfer your delicious apple filling into a serving dish. Pair it with the crispy cinnamon-sugar tortilla chips on the side for dipping. Serve immediately while everything is warm.