Preheat your oven: Preheat to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
Prepare the meatball mixture: In a food processor, combine 1 lb fresh salmon fillet (chopped), 1/2 cup breadcrumbs, 1/4 cup grated Parmesan, 1/4 cup chopped parsley, 2 cloves minced garlic, 1 egg, 1 tsp Dijon mustard, 1/2 tsp salt, and 1/4 tsp pepper. Pulse until the mixture is chunky but well combined, taking care not to over-process it.
Form the meatballs: Using your hands, form the mixture into 1-inch meatballs and place them on the prepared baking sheet. Ensure they are evenly spaced to allow for even cooking.
Drizzle with olive oil: Lightly drizzle the meatballs with olive oil to enhance browning and flavor.
Bake the meatballs: Place the baking sheet in the oven and bake for 15-20 minutes or until the meatballs are golden brown and cooked through. You can check doneness by ensuring they reach an internal temperature of 145°F (63°C).
Prepare the creamy avocado sauce: While the meatballs are baking, in a bowl, mash 1 ripe avocado and mix in 1/4 cup Greek yogurt, 1 tbsp lemon juice, 1 minced clove of garlic, and season with salt and pepper to taste. If the sauce is too thick, add water a tablespoon at a time until you reach the desired consistency.
Serve: Once the meatballs are golden and cooked, remove them from the oven and let them cool slightly. Serve the meatballs topped with the creamy avocado sauce, garnished with additional parsley if desired.