Preheat oven to 425 degrees.
Cook brown rice or quinoa, accordingly. Drain and set aside.
Cut off tops of bell peppers and set aside.
Scoop out inside of peppers and compost the seeds.
In a large pan heat olive oil or water, add onion and garlic and saute for 2-3 minutes until soft. Add in squash and saute for 5-7 minutes. Add any other veggies of choice (carrots, mushrooms, etc).
Stir occasionally for 5 minutes. Remove from heat.
Add in cooked rice, ⅓ herbs (parsley, basil, cilantro), tomatoes, and stir well until combined.
Remove from heat. Season with salt, pepper, and other spices.
Divide the mixture between the peppers and place the tops back on.
Place stuffed peppers in a baking tray. Bake for 20-25 minutes, until slightly brown on edges.
Option to broil for last 2-5 minutes.