Make the sauce: in a small bowl, stir together soy sauce, oyster sauce, maple syrup/sugar, dark soy sauce, cornstarch and water.
Heat oil in a small skillet over medium heat. Crumble your tofu directly into the pan and fry for 3-5 minutes until golden brown, stirring frequently. Add green onion and garlic and fry for another 2 minutes of so.
Give the sauce another quick mix, then pour it over the crumbled tofu and stir with a spatula. Let it come to a gentle simmer and bubble for about 2-3 minutes. It should thicken nicely.
Pour the sauce over a bowl of cooked udon and top with sesame oil and the greens of your green onion. Stir to coat the noodles and enjoy!
