Heat the oven to 350 degrees.
Make the couscous: if using Israeli couscous, bring 1.5 cups water to boil, add the couscous, lower the heat to simmer and cook, covered, 10 minutes. If you're using packaged or non-Israeli couscous, follow the package directions. When finished cooking, set aside.
Add the onion, shallot and garlic to a medium frying pan and cook over medium high heat for 5 minutes. Add the carrots, mushrooms, sundried tomatoes and parsley, stir together and cook an additional 5 minutes.
Make the cashew sauce: add all ingredients to a Vitamin or high-powered blender, and blend for a few minutes, until smooth.
Combine the couscous, veggie mixture, and 1 cup of the cashew sauce, and mix well.
Chop the tops of the bell peppers and scoop out the insides. Fill a baking dish with 1/8"-1/4" of water, and add the bell peppers. Fill the peppers with the couscous mixture, cover the dish with foil, and bake for 30 minutes.
Remove the foil and bake an additional 15 minutes.
Remove from the oven, let cool for a few minutes, top with more cashew sauce, and enjoy!