This easy single serving apple crumble tart is the perfect cool weather dessert. To save time, add a few ingredients to half of the shortbread like crust recipe to make the crumble topping. It's filled with tart apples for the perfect sweet, tart, crumbly bite.
Make crust/topping: Add flour, cold butter, sugar, kosher salt, and cinnamon to a medium sized mixing bowl. Cut butter into dry ingredients. Mix until a small pebble sandy texture.
Spray baking dish with cooking spray. Sprinkle ½ of crust mixture into baking dish (remaining mixture will be used for the topping). Press together with the smooth bottom of a glass or small measuring cup.
Prepare topping: by add oats, brown sugar, and cold butter to remaining crust mixture. Mix together using a fork until a pebbly texture. Refrigerate until assembly.
Assemble filing: Add apple, all purpose flour, sugar, lemon juice, cinnamon, a pinch of kosher salt, and a pinch of nutmeg to a small-medium sized mixing bowl. Toss.