Pizza Pot Pie Casserole

1 ½ pounds lean ground beef or pork sausage
½ cup chopped onion
½ cup chopped green bell pepper
1 can (12 ounces) pizza sauce
1 can (8 ounces) sliced fresh mushrooms
1 cup shredded mozzarella cheese (4 ounces)
1 cup Original Bisquick mix or Master Baking Mix
¼  cup very hot water

Heat oven to 375 degrees.  Grease or spray a 9 x 13 casserole dish.

Cook Ground beef or pork, onion and bell pepper in skillet over medium heat, stirring frequently, until meat is brown; drain.  Stir in pizza sauce and mushrooms.  Heat to boiling, stirring occasionally; reduce heat, Simmer uncovered 5 minutes, stirring occasionally.  Spoon meat mixture into casserole dish.  Sprinkle with cheese.

Mix Bisquick mix and very hot water; beat vigorously 20 seconds.  Turn dough onto surface dusted the Bisquick mix; gently roll in Bisquick mix to coat.  Shape into ball; knead about 10 times or until smooth.  Shape dough into a ball again.  Pat to flatten as much as possible then roll out to the shape of the casserole.  Cut steam vent in 3 places across top with knife or cookie cutter.  Place crust directly on beef mixture in casserole.  Bake 15 to 20 minutes or until light brown.