In a large skillet, heat one tablespoon olive oil over medium-high heat.
Once hot, add the bell pepper and mushrooms. Saute 7-8 minutes, or until softened. Add spinach and allow to wilt.
Drain off any excess liquid.
Turn off heat and set aside.
In a medium mixing bowl, combine chickpea flour, nutritional yeast, parsley, garlic powder, onion powder, salt, baking powder, baking soda.
Mix in the vegetable broth, ¼ cup olive oil, and apple cider vinegar. Mix to form a loose batter. Fold in the sauteed veggies until just combined.
Use a ⅓ cup measure to measure evenly between 9 muffin tins.
Bake for 30-35 minutes at 350F, or until a toothpick inserted in the center of a muffin comes out clean.