Two minutes before orzo is finished cooking, stir in spinach and lemon ... ½ teaspoon salt and ¼ teaspoon pepper. Stir in shrimp, then transfer the shrimp and sauce to the bag with the orzo.
I wrote about that version—accented with wilted baby spinach and cherry tomatoes ... Make sure the grits are simmering and add the raw shrimp directly to the grits. Give it a good stir ...