Cut tofu and mushrooms into bite-sized pieces.
Heat cooking oil in a pan and grill tofu on both sides until golden brown.
Push the tofu to one side and stir-fry the mushrooms.
Add soy sauce, minced garlic, water, and oligosaccharide syrup, then bring to a simmer.
When the sauce thickens, drizzle with sesame oil and sprinkle with sesame seeds.