Japanese Inspired Veggie Pancake

• 1 cup flour
• 0.25 cup corn flour
• 1 zucchini, thinly sliced
• 1 carrot, thinly sliced
• 1 spring onion, thinly sliced (plus extra for garnish)
• 1 cup cabbage, thinly sliced
• 1 tsp everything bagel spice
• 1 tsp kewpie mayo
• 1 tsp kecap manis (sweet soy sauce)
• 1 tbsp sesame seeds (optional)