In a heatproof bowl, whisk the tahini, soy sauce, vinegar, sugar and toasted sesame oil, then add the spring onions. Put the chilli crisp in a pan over a medium-high heat, then add the ginger, garlic and peanuts, and cook until sizzling and aromatic. Pour this over the spring onion mix and stir.
Wipe out the pan and heat the oil. Fry the sausagemeat for five to seven minutes, until browned and crisp, then season to taste with a little sea salt and black pepper.
While the sausage is frying, bring a pan of salted water to a boil. Blanch the broccoli, then lift out with a slotted spoon and refresh under ice-cold water. Cook the noodles according to the packet instructions – to make things easy, boil them in the same water you used for the broccoli.
Pour the spring onion and chilli dressing into the sausage pan, then add the noodles and broccoli, and toss well to coat. Add a squeeze of lime juice, scatter with sesame seeds and serve.