Brown ground meat with onion, drain off any excess fat.
Stir in Worcestershire sauce, soy sauce, tomato paste and sweetener.
Spread meat mixture into 9 or 10 inch pie pan.
In large bowl, melt mozzarella cheese in microwave (for my 900 watt, it was about 2 minutes at 40% power).
Stir butter and egg into melted cheese. Then knead in almond flour, coconut flour and onion powder with hands or spatula. (Microwave for 5-10 seconds if needed to better incorporate the ingredients into the cheese)
Shape crust dough into a ball and roll out between sheets of wax paper to a diameter to fit pie pan.
Remove top sheet of wax paper, then invert rolled crust on top of meat mixture in pie pan. Crimp edges of crust if desired.
Bake pie at 400°F for 15-20 minutes or until browned on top.
Makes 8 slicesPer slice: 249 calories, 13.4g fat, 411mg sodium, 9.2g carbs, 3.4g fiber, 5.8g net carbs, 23.7g protein