Prepare the pasta in boiling salted water according to the instructions on the packet. In the meantime chop the nuts. Wash sage, shake dry and pluck leaves from the stalks. Clean and wash the tomatoes.
Roast the nuts in a pan without fat for approx. 4 minutes while turning. Add butter and melt. Add tomatoes and sage to the hot nut butter and fry briefly. Season with salt, pepper and lime juice.
Pour the spaghetti into a sieve, place in the pan and flip through. Season to taste with salt and pepper. Arrange on plates and slice Parmesan cheese over the pasta.