In a bowl mix together the carrot, sour cream, horseradish, lemon juice. Season with salt to taste. Set aside.
Lightly grease a grill or grill pan with nonstick spray. Preheat the grill or a grill pan over medium heat.
Brush both sides of the zucchini and squash slices with the oil and season with salt and pepper. Grill until tender and slightly browned, about 4 minutes per side.
Season both sides of the salmon with salt and pepper.
Grill the salmon on both sides for 3 -5 minutes each or until an internal temperature of 140 degrees is reached using a thermometer.
Lightly grill the ciabatta to golden brown.
Layer the ciabatta with zucchini and squash, salmon, and carrot horseradish slaw. Cut in half and serve with chips and pickles.