01 - Preheat the oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, combine the chopped salmon, egg, breadcrumbs, parsley, dill, green onions, garlic, lemon juice, mustard, salt, and pepper. Mix until just combined.
03 - Using damp hands, form the mixture into 16 golf ball-sized meatballs and place them on the prepared baking sheet.
04 - Brush or spray the tops lightly with olive oil.
05 - Bake for 18-20 minutes, or until the meatballs are firm and lightly golden.
06 - In a blender or food processor, combine avocado, Greek yogurt, lemon juice, garlic, herbs, salt, and pepper. Blend until smooth, adding water as needed for a creamy, dippable consistency.
07 - Serve the warm salmon meatballs with avocado sauce on the side or drizzled over the top.