Put the canned salmon into a bowl and break it up with a fork.
Add the light Miracle Whip, spicy brown mustard, celery, onion and lemon pepper to the salmon.
Mix all the ingredients together until well incorporated.
Taste the salad. Add a bit more lemon pepper if needed. Set aside.
Remove the stem from the mushrooms and then clean the cap.
I find that when very large mushroom caps are baked, they aren't quite tender enough. So I microwave the mushroom caps for 30-35 sec to soften them up a bit.
Use a paper towel and wick out any liquid that accumulated in the cap
Evenly divide the salmon salad into two portions and stuff each mushroom cap with a portion of the salmon salad.
On a piece of wax paper, mix the Velveeta shreds with the shredded non fat cheddar cheese.
Top each salmon salad stuffed mushroom cap with half of the cheese mixture.
Place the mushroom caps into a foil lined pan and pop into the oven. Bake for 15-20 min at 400℉. The mushrooms are done when they are fork tender near the edge. If you want the cheese slightly brown, place the caps under the broil for a few minutes.