Make the croutons: Preheat the oven to 375 F degrees and line a baking sheet with parchment paper. Add all of the crouton ingredients to a mixing bowl and toss until the bread is well coated. Transfer the bread cubes to the baking sheet and bake at 375 degrees for about 15-20 minutes or until golden brown and crispy, tossing periodically to ensure even baking. Set aside to let cool. Note, there will be extra.
Make the dressing: Add all of the dressing ingredients to a mixing bowl and stir until well combined.
Prep the Salad: Add the chopped romaine to large mixing bowl. Toss with a few spoonfuls of caesar dressing until well coated.
Cook the Salmon: Pat the salmon dry. Heat 2 tbsp olive oil in a large non-stick or cast-iron skillet over medium-high heat. Season the skin side with salt and pepper just before cooking. Place salmon in the hot pan, press gently for even contact, and cook 4–5 minutes until crispy. Season the top, flip, and cook 2–3 more minutes until it reaches 145°F or flakes easily. Remove and set aside.
Assemble: Lastly, toss in the croutons in the salad and top the salad with additional croutons, grated parmesan cheese, and lemon zest. Serve with the salmon and enjoy!