I preheated my oven to 350 °F, then halved the bell peppers and removed the seeds and ribs. I left the stems on for presentation because they looked nice, but you can remove them if you prefer.
In a large bowl I combined the salsa verde, cream cheese, paprika, onion powder, and 3 oz of the grated cheddar (reserving 1 oz for later). Then I folded in the shredded chicken and chopped scallions until everything was well-mixed and creamy.
I scooped the filling into each pepper half, sprinkled the reserved 1 oz cheddar on top, laid the peppers in the baking dish, tented the dish with foil, and baked for 45 minutes to 1 hour or until the peppers were tender.