First, bring a large pot of salted water to a boil. Add the box of pasta and cook until tender/al dente. Drain and rinse well under cold water.
As the pasta is cooking, prep the ingredients and add them to a large serving bowl.
Prep the dressing.
Let's put it all together: add the shells to the serving bowl and pour on the dressing. Mix well.
Taste test for salt and add if necessary.