In a medium skillet, heat the olive oil over medium-high heat.
Add the ground lamb, breaking it up with a spatula, and season with the dried oregano, garlic powder, sea salt, and black pepper.
Cook the lamb until it is thoroughly browned and slightly crispy, approximately 7 to 8 minutes, then remove from heat.
In a small mixing bowl, combine the non-fat Greek yogurt, fresh lemon juice, and fresh dill to create a creamy tzatziki sauce.
Place the warm cooked quinoa at the center of a large plate or bowl.
Arrange the sautéed spiced lamb, diced cucumber, diced tomato, and minced red onion on top of the quinoa bed.
Finish the platter by drizzling the creamy tzatziki sauce over the lamb and vegetables before serving.