Preparing the Salmon Meatballs:

1. Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Finely chop or pulse salmon fillets in a food processor until coarsely ground.
3. In a large bowl, mix salmon, garlic, onion, egg, breadcrumbs, Parmesan, lemon zest, Dijon mustard, dill, salt, and black pepper.
4. Shape mixture into small meatballs (about 1 tbsp each) and place on the baking sheet.
5. Lightly brush or drizzle olive oil over the meatballs.
6. Bake for 15-18 minutes, or until golden brown and cooked through.

Preparing the Avocado Sauce:

1. Blend avocados, Greek yogurt, lime juice, garlic, cilantro, olive oil, salt, and black pepper in a food processor until smooth.
2. Add water as needed to adjust consistency.
3. Taste and adjust seasoning if necessary.