Grind sichuan pepper corns in a coffee grinder, blender or pestle and mortar until coarse ground.
Marinate ground meat with marinade ingredients. Allow to marinate while preparing the other ingredients.
Cut tofu into 1" (2.5 cm) cubes.
Slice scallions diagonally
Preheat wok / saucepan
Add oil to wok / saucepan
Add chili paste and garlic / ginger paste (aromatics) and ground sichuan pepper corns. DO NOT BURN THE PEPPER CORNS as this will result in a bitter taste.
Add ground meat and stir fry until almost done.
Add tofu. Stir.
Mix water, cornstarch and sesame oil.
Add water mixture.
Simmer for a few minutes and allow sauce to thicken.