Cook the pasta in abundant, well salted water until al dente.

While the pasta is cooking, melt a good dollop of butter (or a mixture of oil and butter) in a skillet. Sauté the shallot over very gentle heat for a minute or two, then add a splash of white wine. Raise the heat and let the wine reduce until it become syrupy. Add the cream and reduce again, until you have a nice, 'saucy' consistency. Turn off the heat and add half the salmon roe, mixing it well with the cream. If you like crush a few of the roe to add color and taste to the sauce. Taste and adjust for seasoning; the sauce should be very flavorful.

When the pasta is done, transfer it to the skillet. Turn on the heat to medium-high and mix the pasta with the sauce until all the strands of pasta are well coated with the sauce. If you find the sauce it a bit too thick, add more cream. If too thin, just let the pasta cook a bit longer. The pasta should not be swimming in the sauce, but it should slither around easily in the skillet.

Serve in pasta bowls and top each portion with the remaining salmon roe.