Bring a large pot of water to a boil. Meanwhile, carefully cut around bell pepper stems to create a hole large enough to remove seeds and ribs. Cut an additional half inch or so off the top; chop these pieces and set aside.
When water boils, submerge bell peppers and simmer for about 5 minutes. Drain in a large colander, or set upside down on paper towels.
Combine quinoa and water in a medium saucepan; bring to a boil, reduce heat, cover, and simmer for 15 minutes.
In a large skillet, heat olive oil over medium heat. Add onion and garlic; stir for 5 minutes. Add reserved chopped bell pepper and stir for another 5 minutes. Add pine nuts and cumin and stir for 1 minute, then add zucchini, spinach, oregano, and salt. Stir for 3 minutes, then add cooked quinoa and half the feta cheese.
Preheat oven to 425°. Set peppers in a large rectangular baking dish coated with cooking spray or lined with parchment paper. Fill each pepper with quinoa mixture. Sprinkle remaining feta over tops. Bake for 20 minutes. Serve warm.
Amount Per Serving
% Daily Value*
Total Carbohydrates 31g10%
Dietary Fiber 5g20%
* Percent Daily Values are based on a 2000 calorie diet.