Drain the canned salmon thoroughly and place it in a medium mixing bowl, flaking it apart with a fork.
Add the egg, almond flour, finely sliced green onion, Dijon mustard, lemon zest, sea salt, and black pepper to the salmon.
Mix until well combined and form the mixture into two or three thick patties.
Heat the avocado oil in a non-stick skillet over medium heat. Place the salmon patties in the pan and sear for 3-4 minutes per side until golden brown and crispy.
While the croquettes cook, whisk together the Greek yogurt, lemon juice, dried dill, and garlic powder in a small bowl to create the dressing.
In a large salad bowl, combine the mixed greens, sliced cucumber, and halved cherry tomatoes.
Place the warm salmon croquettes on top of the salad and drizzle with the creamy lemon-dill dressing before serving.