Preheat oven to 375°F. Line a large baking sheet with parchment paper or a silicon baking mat.
In a large skillet, cook sausage over medium-high heat until no pink remains. Pour excess fat from pan.
To the sausage add cream cheese. Stir over low just until melted and completely combined. Set aside.
On a lightly floured surface, roll each sheet of puff pastry into roughly a 16 x 10 inch rectangle.
Brush the edges of each sheet with egg wash. Place one sheet on pan. Spread sausage mixture evenly to within ½ inch of edges. Sprinkle with cheese.
Press second puff pastry sheet over sausage. Use a fork or pastry wheel to seal edges. Brush entire surface with egg wash. Sprinkle with Everything bagel seasoning.
Bake for 30-35 minutes or until puffed and golden.
Let stand on pan for 5-10 minutes to allow pasty to settle.
Cut into 30 even pieces and serve. (May also cut into squares and then triangles, if desired)