Preheat oven to 400 degrees F. Line a baking sheet with parchment paper, a splat mat, or spray with cooking spray.
In a small bowl, mix together the garlic powder, smoked paprika, dry mustard, salt, and pepper.
Place the salmon fillets on the baking sheet, then add the green beans.
Spray the salmon and green beans with cooking spray, then add the seasoning mix.
Bake for 10-12 minutes or until the internal temperature of the salmon reaches 145 degrees F.
Note: The green beans will be tender/crisp. If you want them cooked more you can boil them in water for 3 minutes before baking them.