Heat a grill or grill pan over medium-high heat and spray with cooking spray. Season the salmon with salt and pepper and place on the grill. Grill the salmon to desired doneness, 3 to 4 minutes per side for medium. Remove from the heat and set aside to prepare the salad.
Toss the lettuce and croutons with the dressing in a large bowl and season with salt and pepper. Divide among four plates and sprinkle with the Parmesan. Top each salad with one salmon fillet and serve with the lemon wedges.
Caesar Dressing
Combine the tofu, anchovy paste, lemon juice, Parmesan, and garlic in a blender. Purée until smooth and stream in olive oil. Thin the dressing with water to desired consistency. Season to taste with salt and pepper.