Place your pizza baking pan in your cold oven and turn the oven to 425°F.
For the crust, in a microwave-safe bowl, combine your mozzarella cheese and butter, and microwave for 1 to 2 minutes or until the cheese has completely melted with the butter. Once melted, stir both together.
Next, mix the egg to the mozzarella mixture using a hand whisk.
Continue by adding the almond flour and salt and combine. You can use an electric hand mixer to expedite the process.
Now, use your hands to work the dough like any other regular pizza dough, kneading it for about 3 minutes.
Place your dough on your pizza pan and pat it into a large circle using your hands. Set aside.
In a nonstick pan or cast-iron skillet over medium heat, add your ground meat, season with salt and pepper, and cook, stirring continuously to avoid any meat clumps. Once the meat is browned and crumbly, set it aside for the next step.
Spread the pizza sauce over your mozzarella crust.
Continue by sprinkling your cheese over the sauce, followed by your cooked beef, olives, bell peppers/long hot pepper, red bell pepper, mushrooms, pepperoni, and red onion.
Finalize the process by adding Italian seasoning, if desired.
Transfer your pizza to the oven and bake for about 10 minutes or until the cheese has melted. Then serve hot.