Preheat your oven to 350 degrees.
Turn a burner heat to medium/high under a medium-sized skillet.
Dress the salmon fillet in the garlic powder, sea salt, and pepper.
Pour the 1 t of oil in the pan and lay the salmon top down. Let it sit here for about 5 minutes.
Meanwhile, chop all the veggies and sprinkle over the bed of mixed greens.
After the 5 minutes of the salmon being on the stove, flip it over and transfer it to the oven. Let it sit in the oven for approximately 8 minutes.
In a separate bowl, whisk the mustard, lemon juice, vinegar, and water to form the mustard.
When the 8 minutes are over, check the salmon by peering into the thickest part of the fillet to see that it meets your taste. This timing will give you a medium rare fillet – if you like yours more well-done, cook it longer in the oven.
Carefully cut up the salmon into bite-sized chunks and lay on top of the veggies. Sprinkle with the dressing and enjoy!