Make the base batter: In a large mixing bowl, combine the all-purpose flour, salt-pepper blend, and active dry yeast. Stir well to evenly distribute the yeast. Crack in the egg, then add the warm water in two batches. Stir constantly in one direction until you get a thick, smooth batter with no lumps—it should cling to your spoon or chopsticks when lifted (not runny).
Fold in the vegetables: Add the 100g of chopped scallions and diced carrots (or your chosen mix) to the batter. Stir gently but thoroughly to ensure the veggies are evenly incorporated—avoid overmixing, as this can deflate the future rise.
Rise in the pan (key step!): Place a non-stick pan on the stovetop and turn off the heat (no fire at all). Brush the bottom of the pan with a thin layer of cooking oil. Pour the entire batter into the pan. Wet your hands slightly to prevent sticking, then press and smooth the batter into an even layer (1–1.5cm thick). Sprinkle with black sesame seeds if using. Cover the pan tightly with a lid and let the batter rise to 1.5 times its original size (20–30 minutes, depending on room temperature—risen batter will have tiny air bubbles on the surface and feel soft to the touch).
Pan-fry on low heat: Once risen, turn the stove to the lowest heat setting (critical for even cooking—no high heat!). Cook the pancake for 5–6 minutes, gently rotating the pan occasionally to ensure the bottom heats evenly. The bottom is ready when it turns a deep golden brown and releases easily from the pan when you lift the edge with a spatula.
Flip and finish cooking: Lightly spray the top of the pancake with a thin layer of cooking oil (for extra crispness and to prevent drying). Use one or two spatulas to carefully flip the pancake (the thickness means it needs gentle handling!). Cover the pan again and cook on low heat for another 5–6 minutes, rotating the pan occasionally.
Check for doneness: Press the center of the pancake firmly with your finger. If it springs back quickly and doesn’t leave an indent, it’s fully cooked. If not, cover and cook for an additional 1–2 minutes. Transfer the pancake to a plate, cut into slices, and serve warm.