1.Combine sauce, rind and juice in small saucepan; bring to a boil. Remove from heat.
2.Place noodles in large heatproof bowl; cover with boiling water, separate with fork, drain.
3.Combine flour and five-spice in medium bowl, add tofu; toss to coat tofu in flour mixture.
4.Heat half of the oil in wok; cook tofu, in batches, until browned all over.
5.Heat remaining oil in wok; stir-fry onion, garlic and capsicum until onion softens. Add noodles, peas and half of the lemon chilli sauce; stir-fry until peas are just tender.
6.Serve noodles topped with tofu and drizzled with remaining lemon chilli sauce.