Hamburger-Mushroom Bread Pizza - cooking recipe

Ingredients

1 loaf unsliced Italian bread (16-ounce)
2/3 cup pizza sauce, divided (I use Kittencal's No-Cook Pizza Sauce or Marinara Dipping Sauce or Kittencal's Pizza Sauce)
12 slices onions
1 1/2 cups canned sliced mushrooms, well drained (hand-squeeze out any excess moisture, can use fresh sliced mushrooms)
6 -8 ounces uncooked lean ground beef (divided in half)
1 teaspoon dried Italian seasoning, divided (or to taste)
1 teaspoon garlic powder, divided (or to taste)
1 teaspoon seasoning salt, divided (or to taste)
fresh coarse ground black pepper (to taste)
1/2 cup grated parmesan cheese, divided
2 cups mozzarella cheese

Preparation

Set oven to 500 degrees F.
Slice the loaf of Italian bread in half horizontally.
Place both halves of bread cut-side up on a baking sheet.
Spread about 1/3 cup pizza sauce over the top of each slice of bread then place mushrooms over the sauce (about 3/4 cup sliced mushrooms over each slice).
Place about 6 large onion slices/rings over the top of the mushrooms.
Divide the ground beef in half, then crumble onto top of each half of bread over the mushrooms (the pieces must be VERY small).
Sprinkle about 1/2 teaspoon each of Italian seasoning, garlic powder and seasoned salt over the ground beef (can use more seasonings to taste if desired).
Sprinkle black pepper to taste over both slices, then sprinkle about 1/4 cup Parmesan cheese.
Top with about 1 cup (or more) of mozzarella cheese.
Bake for about 10 minutes (500 degrees F) or until the beef is cooked and the cheese has melted.
Cut each half into 3 pieces.