Step 1
In a food processor, process the macadamias until roughly the same size as breadcrumbs. Place in a frying pan over medium heat with breadcrumbs, oil and ¼ tsp salt. Cook, stirring, for 5-6 mins or until macadamia mixture is golden brown. Strain the macadamia mixture through a fine sieve into a heatproof bowl, reserving the oil. Spread macadamia mixture over baking paper to cool.
Step 2
Cook the pasta in a large saucepan of boiling water, stirring often, for 8 mins or until al dente. Drain, reserving ½ cup (125ml) cooking liquid.
Step 3
Meanwhile, reserve 1 tbs of the reserved oil. Heat the remaining oil in a large frying pan over medium heat. Add the garlic and cook for 30 secs or until just fragrant. Carefully stir in the kale. Season. Cook, stirring frequently, for 2 mins or until the kale wilts. Remove from heat.
Step 4
Add pasta to the kale mixture in the pan along with lemon rind, 2 tbs lemon juice and the reserved oil. Toss to coat. Stir in the parmesan and season with more lemon juice. Add cooking liquid to loosen the sauce, if necessary.
Step 5
Divide the pasta mixture among serving bowls. Top with macadamia mixture and season to serve.