Step 1: Grate the potatoes. Using a box grater or food processor, finely grate the peeled Russet potatoes. This is a crucial step for achieving the desired texture for your Crispy Potato Waffles with Toppings.
Step 2: Remove excess moisture. Place the grated potatoes in a clean kitchen towel or several layers of paper towels. Squeeze out as much liquid as possible. This step is essential for maximum crispness, so squeeze hard!
Step 3: Combine ingredients. In a large bowl, combine the squeezed grated potatoes, all-purpose flour, beaten egg, shredded cheddar cheese (if using), chopped green onions or chives, garlic powder, onion powder, salt, and black pepper. Mix thoroughly until all ingredients are well combined.
Step 4: Preheat waffle iron. Preheat your waffle iron to medium-high heat. Lightly brush or spray the waffle plates with oil, even if it's non-stick, to ensure your Crispy Potato Waffles with Toppings don't stick and get extra golden.
Step 5: Cook the waffles. Spoon about 1/2 cup of the potato mixture onto the hot waffle iron for each waffle. Close the lid and cook for 5-8 minutes, or until the waffles are deeply golden brown and very crispy. Cooking time may vary depending on your waffle iron.
Step 6: Repeat and serve. Carefully remove the cooked Crispy Potato Waffles with Toppings from the iron and transfer them to a wire rack to keep them crispy while you cook the remaining batter. Serve immediately with your favorite toppings.