slice the bell peppers in half and pull out all of the seeds- lay flat on a baking tray and bake at 425 for about 10 minutes or until browned and crispy! Once the peppers are cool enough discard any liquid in the middle of the pepper before stuffing!
In a food processor or emersion blender- blend the cottage cheese until smooth.
Add the pasta sauce to the cottage cheese and stir.
Cook up the mushrooms and onions in a pan with just a little olive oil for about 3-4 minutes or until the soften just a bit and start to brown.
Stuff the peppers with the cottage cheese mixture and then top with mozzarella cheese, the pepperoni and veggies.