How to Make It
Make the batter. Combine the first five ingredients through baking powder in a medium bowl. In another bowl, whisk together the buttermilk, vegetable oil, and egg. Make a well in the center of the dry ingredients, pour in the buttermilk mixture, and stir until just combined.
Make the waffles. Pour enough batter onto the waffle iron to create a thin layer (the thinner, the crispier). Cook until golden brown. Remove and cut into wedges.
Make the sauce. Heat 1 tablespoon of oil in a skillet over medium heat. Cook the onion and garlic for a couple of minutes. Add the remaining ingredients to the pan and cook until liquid is slightly thickened. Season with salt, remove from heat, and place liquid in a blender. Blend until smooth.
Make it Instagram excellent. Toss the waffle pieces in the sauce and arrange on a plate. Garnish with a couple or all of the toppings listed above. Devour immediately.