Heat The Sesame Oil In A Skillet Over Medium Heat. Stir In The Garlic And Salt. Cook And Stir 1 Minute, Then Stir In The Pine Nuts, And Cook Until Golden, About 5 Minutes. Add The Diced Chicken Breast, And Cook A Few Minutes To Reheat. Stir In The Peanut Butter, Soy Sauce, And Jalapeno Pepper Until The Peanut Butter Has Melted. Pour In The Water, And Bring To A Simmer. Cook And Stir Until The Sauce Has Thickened, About 5 Minutes More.