Combine chickpea flour, nutritional yeast, baking powder, sea salt, and pepper in a bowl with 2 1/2 cups water.
3 Whisk to combine and set aside while preparing the veggies.
4 Heat olive oil over medium, high heat in a skillet.
5 Add all veggies to the skillet (except for green onions) and cook until the veggies cook down and begin to brown. Add green onions. Season and remove from heat.
6 Brush a standard sized muffin tin with olive oil. Distribute veggie mixture between muffin cups by the heaping tablespoon.
7 Fill cups with chickpea batter , gently stir each cup with a spoon to ensure the batter gets under the veggies.
8 Bake for 30 , 35 minutes, until a toothpick inserted in the centre comes out clean and frittatas begin to brown on top..