INGREDIENTS
1 1/2 lb
Ground beef
1
pkg Mushrooms, fresh
1
Mayonaise and dijon mustard
1
Garlic salt
1
Pepper
1/4 tsp
Salt
4
Hamburger buns, toasted
2 tbsp
Butter
2 tbsp
Gorgonzola cheese
2 oz
Light cream cheese
1 - 18 inch long piece of heavy duty foil