Wash the beans thoroughly and trim off ends (with the stem).
Sauté beans in large skillet for about 8-10 minutes with two tablespoons of olive oil, over medium heat. Stir every 2 minutes.
After green beans are blistered, turn off heat.
Add in one tablespoon of grainy mustard. Toss beans until well coated.
Optionally, add in one tablespoon each of yellow mustard and onion powder and re-toss.
Plate and serve.
Notes
*Nutritional information is calculated using online tools and is provided as a courtesy. The values can vary depending on which ingredients and brands are used.