Preheat oven to 350 degrees. Place artichokes in a food processor, and pulse until artichokes are chopped well. Set aside.
Heat olive oil over medium heat. Add onion and zucchini. Cook 3-5 minutes or until vegetables are softened. Lower heat, and add garlic. Cook 1 minute, stirring constantly so garlic doesn't burn.
Add tomato sauce, artichokes, olives, oregano, parsley, and salt. Cook 15 minutes, or until sauce is thickened.
While sauce is cooking, prepare peppers. Cut in half lengthwise, and remove stems and seeds. Place peppers in boiling water for 5 minutes. Drain in colander, and place in a large baking dish.
When sauce is finished, mix in the quinoa and pine nuts. Stir well. Spoon mixture evenly into pepper halves. Add hot water to dish to a depth of ½ inch. Bake uncovered for 20 minutes.