Pre-heat the oven to 425 degrees F. Toss the cubed sweet potatoes with 1 tablespoon of olive oil and season with salt and pepper. Roast for about 25 minutes, stirring once, until golden and softened. Let cool.
In 4 bowls, arrange equal amounts of the lettuce and top with piles of the sweet potatoes, beets, cherry tomatoes, avocados and chickpeas. Lay a piece of salmon on top of each salad. Toss with vinaigrette as needed.
For the Salmon:
Season the salmon filets with salt and pepper on both sides. Grill on a hot grill pan for 3-4 minutes on each side until just slightly pink in the center. Remove and set aside.
For the Mustard Herb Vinaigrette:
Combine all the ingredients in medium bowl and whisk until everything is incorporated.
Notes
Swap out the salmon for chicken if you prefer. You can also leave off the meat for a side salad.