In a large pot of salted boiling water, cook the orzo according to package instructions until al dente, about 8-10 minutes. Drain, reserving 1/2 cup of the pasta water, and set aside.
In a large skillet, heat olive oil over medium heat. Add the minced garlic and red pepper flakes, sautéing for about 1 minute until fragrant, but not browned.
Add the shrimp to the skillet and season with salt and pepper. Cook for 2-3 minutes on each side or until the shrimp are pink and opaque.
Add the cooked orzo, cherry tomatoes, lemon juice, lemon zest, and reserved pasta water to the skillet. Toss everything together gently until well combined and heated through.
Remove from heat and stir in the fresh parsley. Adjust seasoning with additional salt, pepper, or lemon juice as needed.
If using, sprinkle feta cheese over the top before serving.
Notes
Serve in a large, shallow bowl, garnished with extra parsley and lemon wedges.