Toss the shrimp with the salt and pepper in a medium-sized bowl, set aside.
1 1/2 pounds large shrimp
In a large pan over medium heat, melt the butter.
1 1/2 pounds large shrimp
Add the shrimp and saute for 2 minutes until they start to turn pink.
1 1/2 pounds large shrimp
Add the garlic and cook for 1 more minute, stirring constantly until fragrant.
1 1/2 pounds large shrimp
Add the flour and stir to coat the shrimp. Add the lemon slices to the pan.
1 1/2 pounds large shrimp
Slowly, pour in the half & half, stirring constantly and cooking until the sauce thickens, 2-3 minutes.
1 1/2 pounds large shrimp
Add the parmesan cheese and stir to incorporate. Cook for 30 seconds to 1 minute more and remove from heat. Taste and adjust seasoning if necessary.
1 1/2 pounds large shrimp
Stir in the lemon zest. Add more parmesan, cracked pepper and chopped parsley as an optional garnish. Serve over pasta, rice, polenta, or however you wish!