Preheat the oven to 400 degrees. Line a baking pan with foil and lightly spray with non-stick spray or rub with olive oil. Set aside.
Heat about a tablespoon of olive oil in a large skillet over medium high heat. Add mushrooms and cook for about 5-6 minutes or until they begin to release their liquid.
Sprinkle with garlic powder and sea salt, and continue to cook for another 3-4 minutes until they're golden brown. Add cooked (or frozen) quinoa and toss to combine. Cook for another minute or two. If the pan starts to dry out, add 1-2 tablespoons of water. Remove from heat and cool slightly.
Transfer the mixture to the bowl of a food processor or blender. Pulse until the mixture is ground into a uniform paste.
Scoop the mixture into a medium sized bowl. Add the breadcrumbs and crumbled goat cheese and mix until fully combined. The mixture should be able to hold its shape when rolled into a ball.
Using a cookie scoop or a heaping tablespoon measure, scoop the mixture out and roll into balls. Place on prepared baking pan.
Spray or rub the meatballs with a little olive oil and bake for about 15 minutes or until heated through and lightly browned. Serve hot.