We get the shrimp from Price Club, in the freezer section. The shrimp have been peeled except for the tails. Of course, you can use fresh shrimp. Basil makes wonderful vinegar. Basil vinegar is very useful in making salad dressings or splashed in soup or over vegetables.
Purple basils are gorgeous in a vinegar as they turn a beautiful dark red.
Warm 2 cups of white wine vinegar in a non-aluminum pan. Just until it starts to simmer. Don't let it boil. Pour over a sterile dry pint-canning jar filled with fresh clean, dry basil leaves. Cover and let sit for 2 weeks.