Cook orzo in salted water according to package directions; drain and set aside.

In a large skillet, saute onion, pepper and garlic in olive oil over medium heat until soft. Add tomatoes and seasoning; bring to a simmer. Add shrimp and cook until shrimp are bright pink and cooked through, about 5 minutes.

Spoon cooked orzo into shrimp mixture; stir to combine. Remove from heat and stir in basil. Sprinkle with feta when served.