In a small bowl, make the tzatziki sauce by whisking all ingredients together. Cover and place in the fridge until ready to serve.

Preheat the oven to 400 degrees Fahrenheit.
Meanwhile, make the meatballs by combining all of the meatball ingredients into a large bowl, minus the avocado oil. Using your hands, incorporate all of the ingredients until combined.
Scoop out ¼ cup of the mixture and roll into a meatball. Repeat with the remaining meatball mixture. It should make about 8 meatballs.
Heat an oven-safe skillet over medium-high heat and add the avocado oil. Add the meatballs and cook for 2 minutes per side to brown, and then transfer the pan to the oven and cook for about 15 minutes until cooked through.
Serve immediately with the tzatziki.