Step 1

Preheat the oven to 350 degrees F.

Step 2

Heat a large nonstick skillet over medium-high heat. Add the ground beef, salt and pepper, and cook until the ground beef is browned, crumbling with a wooden spoon.

Step 3

Turn the heat to medium and add the olive oil. Stir in the onions and cook until soft, 4 to 5 minutes. Stir in the garlic, oregano and red pepper flakes, and cook for 1 minute.

Step 4

Add the crushed tomatoes and brown rice, and simmer the mixture for 5 minutes.

Step 5

Remove from the heat and stir in the kalamata olives and parsley.

Step 6

Place the peppers, cut side up, in a large baking dish. Divide the ground beef mixture evenly between the peppers. Pour ½ cup water in the bottom of the baking dish.

Step 7

Cover tightly with foil and cook until the peppers are tender, about 35 minutes.

Step 8

Sprinkle 2 teaspoons of feta cheese over each pepper. Bake for an additional 5 minutes. Serve.