In a pot, bring rinsed green lentils and vegetable broth to a boil. Cook until soft, and drain.
Preheat oven to 350 degrees Fahrenheit.
Cut bell peppers in half. Remove seeds and the inside of the pepper. Rub with olive oil.
Roast in peppers in the oven until just fork tender - about 15-20 minutes.
In a bowl, combine lentils, rice, feta, lemon juice & zest, capers, chili flakes, thyme, parsley and garlic.
Stuff peppers with filling. Sprinkle with Parmesan cheese.
Bake for another 20 minutes in oven until heated through. Enjoy!