In a saucepan, sprinkle cornstarch and sugar over the cherries; stir to combine. Cook and stir over medium heat for about 10 minutes or until thickened and bubbly.
Meanwhile, in a medium bowl, thoroughly combine crumbled graham cracker, butter, and chopped pecans.
Spoon the cherry mixture into a bowl and sprinkle the cookie mixture over top and add a scoop of ice cream.