Place deveined shrimp in a medium bowl then add 1 tablespoon of olive oil, juice from half of the lemon, all of the zest, half of the minced garlic, red pepper flakes and a pinch of salt and pepper.
Turn to coat the shrimp then let it sit for 10 minutes.
To a large skillet melt butter and add the remaining tablespoon of olive oil over medium heat. Add orzo turning to coat and cook 1-2 minutes or until lightly golden and toasted.
Add the remaining garlic and cook 30 seconds. Reduce heat to low, pour in the wine and cook 1 minute letting it reduce.
Pour in chicken stock and the juice from the other half of the lemon and spinach.
Season with salt and pepper. Cover, bring to a boil then reduce heat and and simmer 8-10 minutes or until the orzo is cooked to al dente. Stir occasionally so the orzo doesn’t stick to the bottom of the pan.
Stir the parmesan cheese into the orzo then place raw shrimp on top of the orzo in a single layer, shaking off excess moisture and gently pressing them into the orzo.
Cover and cook over low heat 3-4 minutes or until the shrimp are pink and just cooked through.
Remove from the heat. Sprinkle parsley over the top then cover the skillet and let the dish rest 2 minutes. Serve right away.