During the summer months, this side dish is on repeat in my house. I first enjoyed this dish while in cooking school and have been making it ever since. The recipe is adapted from Chowhound and this is now my favorite version, especially during the summer when the tomatoes are in abundance. It is the perfect side dish to grilled pork, chicken and fish. Enjoy!
Add the mustard, salt and pepper and whisk until combined. Whisking constantly, add the oil in a slow, steady stream. Stir in the capers and olives and taste for seasoning.
Bring a large pot of salted water to a boil. Add trimmed green beans and cook until crisp-tender, about 3 to 4 minutes. The green beans should be cooked through but still have a slight crunch. Drain well in a colander and while still hot, add the green beans to the dressing.
Toss until well coated. Add the tomatoes, and if using, feta cheese and pine nuts, and gently combine. Transfer to a serving bowl and sprinkle with parsley. Serve warm or at room temperature- both are delicious. Be sure to give a gentle toss just before serving to make sure all the green beans are well coated.