Preheat the oven to 350°F and grease a 13x9 inch baking pan or line it with parchment paper.
Place the flour, sugar, salt, and cold butter (cut into small pieces) into a bowl. Knead the butter into the flour mixture with your fingers until coarse and crumbly.
Wrap the dough in plastic wrap and chill for 30 minutes.
Afterwards, roll out the chilled dough to fit the pan and gently press it into the pan. Make sure that the dough forms an even layer. Prick the dough several times with a fork and then pre-bake the crust for 10 minutes.
Meanwhile, peel, core, and dice the apples. Peel and dice the mango.
In a bowl, combine the cream cheese, yogurt, eggs, sugar, vanilla extract, and lemon juice, Mix until smooth and then fold in the diced apples and mango.
For the filling: In another bowl, combine the flour, rolled oats, brown sugar, and cinnamon. Add the cold butter (cut into small pieces) and knead it until coarse and crumbly.
Pour the filling evenly over the pre-baked crust. Sprinkle the crumble topping evenly on top.
Bake at 350°F for 35-40 minutes or until the crumble topping is golden brown.
Let the apple-mango bars cool slightly before cutting into squares and serving. Enjoy!
