In a medium bowl, combine the cornstarch, stock, rice wine and soy sauce; whisk until smooth; set aside.
Heat a wok or large skillet, over medium-high heat.
Once hot, add 1 to 2 tablespoons of oil, along with the celery.
Cook, tossing, for 2 to 3 minutes, until the celery is slightly softened; push it to the side.
Add the ginger, garlic and three-quarters of the scallions; toss for 30 seconds until fragrant.
Add the greens and toss for 1 to 2 minutes until slightly wilted.
Toss in the tofu (chickpeas) and cashews; stir-fry for another 1 to 2 minutes until the tofu (chickpeas) is warmed through.
Stir the cornstarch mixture; swirl into the wok or skillet; toss until the sauce thickens and coats everything.
Taste and season with a little salt, if needed.
Top with the remaining scallions and the sesame seeds; serve with rice.