Prepare your saffron by crushing about a tenth of a gram into powder.
Remove the leaves from the basil, tie the stems into a bunch, and put them in a pan of boiling salted water with a dash of olive oil. Cook the pasta al dente. (You can also add a little saffron, diluted the day before in cold water, at the end of cooking).
In the meantime, chop the basil, reserving a few leaves for decoration, crush the ricotta with a fork, and mix in olive oil, saffron, salt and pepper.
When the pasta is cooked, drain it, put it in a hot dish, pour in the saffron ricotta and the chopped basil. Mix, and serve after decorating with the preserved leaves.