In a small bowl, whisk together dressing ingredients. Refrigerate covered until ready to serve.
Pat salmon fillets dry with a paper towel and place in steamer basket. Season fillets with salt.
Add water to the Instant Pot®. Insert steam rack. Place steamer basket on steam rack. Lock lid.
Press the Manual or Pressure Cook button and adjust cook time to 5 minutes. When timer beeps, quick-release pressure until float valve drops and then unlock lid.
While salmon is cooking, prepare two salads by dividing salad ingredients between two bowls. Toss with dressing. Place cooked salmon fillets on top of each salad and serve.