Add the beans and cook until just tender, 4 to 5 minutes.
Drain and run under cold water to stop the cooking process.
Drain again and pat dry.
Place in a large bowl.
Toss with the shallots and oil. Season with salt and pepper.
Just before serving, toss beans with the vinegar. Toss with the basil.
Serve.
• Have plenty of sparkling water and lemons and limes (cut in quarters) on hand. You can pop half a lime in the microwave on high for 10 seconds to make it more pliable.• Making brewed iced tea?
Let it cool before refrigerating, or it will cloud up.