Preheat Oven To 350 Degrees F (175 Degrees C). Unroll Each Piece Of Refrigerated Pie Dough On A Floured Surface And Cut Each Into 6 Equal Pieces. Spoon 1 Tablespoon Of Peanut Butter Into The Center Of Each Piece Of Dough, And Place 2 Slices Of Apple On The Peanut Butter. Top Each Square With A Slice Of Cheddar Cheese. Dip Your Finger In Water, And Moisten The Edges Of Each Piece Of Dough. Fold The Dough Over Into A Triangle Shape, And Seal The Edges. Bake In The Preheated Oven Until The Cheese Has Melted And The Pies Are Golden Brown, 15 To 20 Minutes.