Vegetable oil
1 Tbsp kosher salt plus 1 1/2 tsp
3/4 lb linguine
3 Tbsp unsalted butter
2 1/2 Tbsp olive oil
1 1/2 Tbsp minced garlic (4 cloves)
1 lb large shrimp (about 16 shrimp), peeled and deveined
1/4 tsp freshly ground black pepper
1/3 cup chopped fresh parsley leaves
1/2 lemon, zest grated
1/4 cup freshly squeezed lemon juice (2 lemons)
1/4 lemon, thinly sliced in half-rounds
1/8 tsp hot red pepper flakes