cook the pasta in the salted water for 8-10 minutes, depending on cut. Cook until just al dente
in a large skillet, add 1 tbsp olive oil. heat over medium flame, then add in the sausage links. Cook until golden brown on all sides, about 8-10 minutes
while the pasta and sausage are cooking - place the halved tomatoes into a large bowl. Cut the green beans into short lengths and add to the same bowl
add in the scallions and basil leaves
drain the pasta and add to the bowl
cut the sausage links into 1 inch diagonal pieces and return to the skillet to further brown - about 4 minutes more
add the sausage to the bowl
add in the zest, juice, olive oil, salt, pepper and parmigiano (if using)
