In a medium saucepan, melt butter and cook onion and garlic for about 2 minutes.
Add broth , rice, salt, paprika, garlic powder, red pepper flakes. Cover and cook on medium low for 20 minutes.
About 3 minutes brofore done, open lid and dump broccoli on top. Place lid back on. This will steam the broccoli a little.
After the 20 minutes is up, Stir in the broccoli and the cream cheese. Place lid back on and let sit 5 minutes to melt cheese and cook broocoli more. Stir in 1 ½ cups of the cheddar cheese (6 ounces).
Cut each pepper in half and get rid of the seeds and membranes. Place in a baking dish and heat oven to 400 degrees. Fill peppers with rice mixture. Bake 15 minutes. Sprinkle remaining ½ cup cheese on top and bake 5 more minutes.