Preheat the oven to 400°, split the Red Bell Peppers in half, remove the stems and seeds, drizzle with Olive oil, and season with 1/2 teaspoon of Kosher salt.
Place in the oven and roast for 15 minutes.
For the filling, sauté the Red Onion on a medium-high heat in a couple of tablespoons of Olive oil for 2 - 3 minutes, add the fresh Spinach and cook that down. It will seem like a lot, but believe me, the Spinach cooks down.
It will take about 4 - 5 minutes and you want to cook out most of the liquid, at the end add the Garlic and cook for a minute more minutes, remove from the pan and allow to cool.
If your timing is right, the Peppers will be ready to come out of the oven. For the filling, we’re going to combine Feta Cheese, Monterey Jack, 1 Egg, and Red Chili Flakes.
Be sure to mix thoroughly and taste for seasoning, add Salt if needed, just remember the Feta Cheese is salty, and that’s why you want to taste.
Now time to stuff the Peppers, I like to fill them 3/4 and then come back and top them off.
Finish the stuffed Red Bell Pepper with the Mozzarella Cheese and into a 300° oven for 20 to 25 minutes until golden brown. Remove from the oven and finish the Greek Stuffed Red Bell Peppers with a sprinkle of chopped Italian Parsley and a few Red Chili Flakes.