In a small bowl, whisk together the Dijon mustard, honey, garlic powder, and lemon juice to create the golden glaze.
Pat the salmon fillet dry with a paper towel and season both sides with sea salt and black pepper.
Heat the olive oil in a non-stick skillet over medium-high heat.
Add the green beans to the skillet and sauté for 4-5 minutes until they are bright green and slightly blistered, then move them to one side of the pan.
Place the salmon fillet in the skillet, skin-side up, and sear for 3-4 minutes until a golden crust forms.
Flip the salmon and brush the top generously with the prepared honey-mustard glaze.
Cover the pan and cook for another 3-4 minutes, or until the salmon is cooked through and the glaze is bubbly.
Serve the salmon immediately alongside the crispy green beans.