Wash zucchini and cut in half down the length of it.
Spoon out all of the seed center.
Lightly coat zucchini half with olive oil by rubbing in inside and on the outer skin. Sprinkle Montreal Steak Seasoning on the inner side of the zucchini.
Set on 2 separate baking pans until ready to fill.
In large mixing bowl, combine sausage and ground beef. Mix thoroughly.
Add softened cream cheese and mix thoroughly into the meat mixture.
Add 2 tsps. of Montreal steak seasoning, parsley, garlic and the egg to the meat mixture and mix thoroughly.
Then add the onion, parmesan cheese, cheddar cheese and bread crumbs to the mixture and again mix until it is mixed throughout the meat mixture.
*optional* You can chop up the insides that have been scooped out of the zucchini and add them at this point.
After all ingredients are mixed in well, fill zucchini halves with the meat mixture.
Lightly sprinkle cheddar cheese on top of them and put them in the oven to bake.
Oven should be preheated and set to 375 degrees.
Bake for 60 minutes until meat is thoroughly cooked.
Meat temperature of 170 degrees.