Ingredients:

• 1 pound green beans (haricots verts), trimmed
• 1/4 cup red onion, finely chopped
• 3 tablespoons unsalted butter
• 2 tablespoons parsley, finely chopped
• 2 tablespoons fresh thyme leaves
• 2 tablespoons tarragon or basil, finely chopped
• 2 tablespoons chives, finely chopped
• Salt and pepper, to taste
• Lemon wedges