Chicken Breasts Wellington(Easy And Tastes Great!) - cooking recipe

Ingredients

1 sheet Pepperidge Farm puff pastry, thawed to room temperature*
1/4 c. butter
1 lb. skinless chicken breasts (4)
4 oz. cream cheese
Knorr Swiss Aromat seasoning for meat to taste
Lawry's lemon pepper to taste
1/4 stick melted butter
1 large yellow onion, sauteed
1/2 lb. mushrooms
1 beaten egg white

Preparation

*It comes frozen in a 17 1/4 ounce box (2 sheets).