
In a large bowl, combine the shrimp with 2 tbsp olive oil, lemon zest, red pepper flakes, 1 tsp kosher salt, 1/2 tsp black pepper, and half of the minced garlic. Toss well and let the shrimp marinate while you prepare the orzo, or refrigerate for up to 1 hour.

Set a Dutch oven or wide heavy pot over medium heat. Add the butter, remaining 4 tbsp olive oil, remaining garlic, orzo, and 1 tsp kosher salt. Cook, stirring often, for about 5 minutes, until the orzo smells nutty and looks lightly toasted.


Pour in the white wine carefully, as it may bubble up. Stir for about 1 minute, until most of the wine is absorbed. Add the boiling water, seafood stock, or chicken stock, then reduce the heat to low. Cover and simmer for about 12 minutes, stirring once or twice, until the orzo is al dente and creamy.


Stir the marinated shrimp into the orzo, cover, and cook for 2 to 4 minutes, just until the shrimp turn pink and opaque. Remove the pot from the heat and let it stand, covered, for 2 minutes so the shrimp finish gently.



Stir in the lemon juice and chopped parsley. Taste and adjust with more salt, black pepper, or lemon juice as needed. Serve immediately with toasted bread for soaking up the garlicky sauce.