Preheat the oven to 375°F (190°C).
In a medium bowl, combine almond flour, grated Parmesan cheese, baking powder, and salt.
Add the beaten egg and olive oil to the dry ingredients and mix until a dough forms.
Press the dough evenly into the bottom and up the sides of a 9-inch deep dish pie pan to form the crust.
Bake the crust for 10 minutes until it starts to set and lightly brown.
In a large bowl, whisk together the eggs and heavy cream until smooth.
Stir in shredded mozzarella cheese, shredded cheddar cheese, cooked ground beef, black olives, green bell pepper, red bell pepper, onion, sugar-free pizza sauce, dried oregano, garlic powder, and black pepper.
Pour the filling mixture into the pre-baked almond flour crust, spreading evenly.
Bake the quiche for 30 minutes or until the filling is set and the top is golden brown.
Remove from the oven and let cool for 5 minutes before slicing and serving.