Start by slicing the bell peppers in half vertically and removing the seeds and wriggly bits from inside. Alternatively you can stand the pepper up, cut around the top part and pop out the seeds and stems.
Place the peppers in a baking tray and drizzle the 2 tsp of avocado oil over, you can also use olive oil or you can brush them with butter. In fact you can brush the oil on as well. You want to make sure the open side of the peppers is facing up when doing this. Season well with salt and pepper and bake in the oven at 190C for 10-15 minutes till they start to get tender. In the even you don't have an oven you can cook the peppers on a dry frying pan, on a low heat, covered with a lid, for 10 minutes.
Once the peppers are done flip them over to remove any water that collects in them and allow them to cool.
To make the stuffing heat the butter in a pan and once melted add in your meat and sautee. You want to keep working the meat and breaking it up so no lumps form. Season the meat with the Everything Bagel seasoning and also the chilli flakes and paprika and continue cooking.
Once the meat turns sort of gray and starts to get some colour add in the mushrooms and spinach and mix well. You can also cover it with a lid for 2-3 minutes to allow the spinach to wilt. Both mushrooms and spinach tend to release water so cook that water out and then add in the cheese, heavy cream, sour cream, sliced olives and parsley.
Give everything a good mix and cook the meat till all the liquid in the pan dries up. Then flip the peppers back over and stuff it with the meat mixture, top with cheese, sprinkle some fresh parsley and place in the oven at 200C for about 10 more minutes till the cheese is nicely brown and golden. If you don't have an oven, put the peppers in a dry pan on a low heat and cover and cook with the lid on for 7 minutes. Halfway through make sure to open it up and throw in about a tbsp of water and cover it. This will create some steam that will help melt the cheese.
Anyway garnish with some fresh parsley and serve.