Place the beans in a large skillet and add 1/3 cup water. Heat over medium-high heat. Once the water starts boiling, cover the skillet and boil the beans for 3 minutes. Then uncover and cook until the water is fully evaporated, about 1 minute.
Once all the water has cooked out, add the olive oil, chives, tarragon and kosher salt (take care because any additional moisture can cause the beans to momentarily spit). Sauté for about 1 minute more until tender, stirring frequently.
Turn off the heat and remove the beans to a bowl. Stir in the lemon juice. Taste, then add plenty of fresh ground pepper and a few additional pinches of kosher salt. Garnish with optional add-ins, if desired. Eat immediately. Leftovers store 2 to 3 days refrigerated: though the bright green color is lost, they still taste great.