Preheat the oven to 350°F (175°C). Grease the baking pan.

In a mixing bowl, combine flour, sugar, butter, and salt. Mix until crumbly.

Add the egg and mix until a dough forms. Press half of the dough into the bottom of the prepared pan.

In a saucepan, combine cherries, sugar, cornstarch, lemon juice, and vanilla. Cook over medium heat until thickened.

Spread the cherry filling over the crust in the baking pan.

Crumble the remaining dough over the cherry filling.

Bake in the preheated oven for 30 minutes or until golden brown.

Allow to cool before cutting into bars.