In a large bowl, whisk together chickpea flour, baking powder, garlic powder, salt, and black pepper.
Add water and olive oil to the dry ingredients and whisk until smooth, then let the batter rest for 5 minutes.
Fold in the grated zucchini, diced bell pepper, and sliced scallions until evenly distributed.
Preheat your waffle iron and spray generously with cooking spray.
Pour about 1/2 cup of batter into the waffle iron and cook for 4-5 minutes until golden and crispy.
Repeat with remaining batter and serve hot, topped with Greek yogurt or a fried egg if desired.