Preheat the oven to 350 degrees Fahrenheit. In a skillet, brown ground beef and onion, drain and set aside. In a bowl, beat the eggs, then whisk in the mayo, cannabis milk, flour, oregano, salt and pepper. Stir in cooked beef mixture and 1 cup cheese. Pour mixture into pie shell and bake for 40-45 minutes until eggs are firm. Remove from oven and sprinkle with remaining cheese. Allow to stand for 5 minutes before cutting.