Stuffed Bell Peppers (no rice)

The other day at CostCo I saw some prepackaged stuffed bell peppers and they looked delicious!  It had inspired me to try something that I had never had, nor ever cooked before.  The problem was, I didn't think I wanted rice like is in most recipes.  So I set off on an adventure to create my own recipe loosely based on a few I found online.  This is what I came up with:

Stuffed Bell Peppers

Ingredients:

6 bell peppers

1 lb ground beef

1 onion, diced

1/2 cup of mushrooms

1/3 cup of feta cheese

Mozzarella cheese, shredded

Spices (I think I used onion powder, garlic powder, and Club House Roasted Garlic & Peppers - I love this spice)

Preheat the oven to 350°F. Cut the tops off the peppers, remove the seeds and veins, and cut a little off the bottom to level it out if it isn't sitting upright properly.  Next roast the peppers in the oven on parchment paper for about 20 mins or until they start to get soft/slightly browned.  While they are roasting, brown the ground beef until cooked. Next throw the onions in to cook/soften, and then add the mushrooms to do the same.  When it's all cooked, add the spices and feta cheese.  When the peppers are ready, spoon in the filling and top each with shredded mozzarella cheese.  Baked at 350°F until the cheese is melted, about 10-15 minutes, then set the oven to broil just until the cheese starts to brown and bubble.