Preheat oven to 375°F (190°C) and grease or line a muffin pan.
In a large bowl, combine grated zucchini, carrot, bell pepper, and onion.
Add chickpea flour, almond flour, baking powder, baking soda, spices, and nutritional yeast. Stir well.
Mix flax eggs, olive oil, and plant-based milk in a small bowl, then add to dry mixture.
Stir until just combined, then divide batter evenly among muffin cups.
Bake for 25–30 minutes until golden and firm to the touch.
Cool slightly before removing from pan and enjoy warm or at room temperature.