Barefoot Contessa's Roasted Shrimp and Orzo

kosher salt

olive oil

orzo pasta (rice-shaped pasta)

fresh lemon juice (3 lemons)

fresh ground black pepper

lbs shrimp, peeled and deveined

minced scallion, white and green parts

chopped fresh dill

chopped fresh flat-leaf parsley

hothouse cucumber, unpeeled, seeded, and medium-diced

small-diced red onion

good feta cheese, large diced