Heat a large deep skillet over medium heat and add a drizzle of olive oil. Add the sliced chicken sausage and cook for about 2 minutes, just until lightly browned.
Add the tomatoes and cook for 1β2 minutes, stirring occasionally.
Add the pappardelle nests and place the whole Boursin cheese in the pan. Squeeze half of the lemon into the pot and place both the juiced lemon and the other half in the pot. Pour in the chicken broth.
Bring to a gentle simmer, cover, and cook for 6β7 minutes, stirring occasionally to help the pasta nests separate.
Once the pasta is mostly tender, remove the lid and continue simmering for 2β3 minutes, stirring until the Boursin melts and the sauce becomes creamy and coats the pasta.
Finish with the zest and juice of the lemon and some salt and pepper. Stir everything together and serve.