01 - Bring a large pot of salted water to a rolling boil. Add orzo and cook according to package directions until al dente. Drain through a strainer, reserving 1/2 cup of the starchy pasta water. Set aside.
02 - While the orzo cooks, heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Season the shrimp with salt, pepper, and dried oregano. Sear for 2 to 3 minutes per side until they turn pink and become opaque. Transfer the shrimp to a plate and set aside.
03 - In the same skillet, add the remaining tablespoon of olive oil. Add the minced garlic and red pepper flakes (if using), and sauté for about 30 seconds until fragrant, being careful not to burn the garlic.
04 - Add the halved cherry tomatoes to the skillet and cook for 2 to 3 minutes, stirring occasionally, until they soften and begin to release their juices.
05 - Stir the chopped baby spinach into the skillet and cook for approximately 1 minute, just until wilted and bright green.
06 - Add the drained orzo to the skillet along with the lemon zest, lemon juice, half of the crumbled feta, and the reserved pasta water. Toss everything together until well combined and creamy.
07 - Return the seared shrimp to the skillet and gently toss to incorporate. Serve warm, garnished with the remaining feta and freshly chopped parsley.