Preheat oven to 425 degrees f.
Whisk oil, honey, and dijon in a small bowl until very thoroughly combined.
In large glass bowl coat green beans with dijon mixture. Toss to coat beans VERY well.
Spread green beans evenly on 2 separate large sheet pans.
Sprinkle with sea salt and pepper if desired.
Roast in preheated 425 f. oven for about 7 minutes, then carefully toss/turn beans, and roast for an additional 6-8 minutes until crispy and nicely glazed with the honey dijon.
Serve immediately