Season the Shrimp: In a medium bowl, toss the shrimp with 1 tablespoon of olive oil and Cajun seasoning until evenly coated.
1 pound large shrimp, peeled & deveined, 2 Tablespoons olive oil, divided, 2-3 teaspoons Cajun seasoning
Sear the Shrimp: In a deep, large skillet or Dutch oven over medium-high heat. Add the seasoned shrimp in a single layer and cook 1–2 minutes per side, or until just cooked through. Remove and set aside.
Sauté the Aromatics: Add the remaining 1 Tablespoon of oil to the same pan. Add the diced onion and garlic. Sauté over medium heat for 3–4 minutes, or until softened and fragrant.
1 small (or 1/2 large) yellow onion, 8 cloves garlic, minced
Toast the Orzo: Stir in the orzo and sauté for 1–2 minutes. Pour in the water or broth and add the salt.
1 cup dry orzo, 2 1/2 cups water or chicken broth, 1/2 teaspoon Morton kosher salt*
Simmer: Bring to a boil, then reduce heat and simmer uncovered for 8–10 minutes, stirring often, until the orzo is al dente and most of the liquid is absorbed.
Add the Cream & Spinach: Over medium heat, stir in the half and half and the baby spinach. Cook for 1–2 minutes, just until the spinach wilts.
1 cup half and half, 1 5- ounce clamshell baby spinach
Finish with Cheese & Lemon: Return the shrimp to the pan and stir to combine until warmed through. Turn off the heat. Stir in the grated parmigiano reggiano until fully melted. Stir in the lemon zest and juice. Serve warm.
3 ounces (1 cup) parmigiano reggiano, grated, 1 lemon zested, 1/2 lemon, juiced