Bring water to boil in a medium pot on the stove.
Blanche the green beans for 4 minutes, then strain.
1 ½ pounds green beans
While the green beans are cooking, heat olive oil in a large pan over medium-high heat.
2 tablespoons olive oil
Cook the red onion until it begins to soften.
½ red onion
Add the strained green beans to the pan and sauté for 2 minutes.
While the green beans and onions are cooking, whisk together the remaining ingredients.
1 tablespoon honey, 1 tablespoon wholegrain mustard, 1 tablespoon red wine vinegar, ½ teaspoon salt, pinch ground black pepper
Turn off the heat, pour the honey mustard sauce over the green beans and toss to coat.
Adjust seasoning if needed, transfer to a serving dish, eat, and enjoy!