Preheat your oven to 400°F and line a baking sheet with parchment paper.
Toss the diced sweet potatoes with half of the olive oil, sea salt, and black pepper, then spread them in a single layer on the baking sheet.
Roast the sweet potatoes for 15 minutes, then add the broccoli florets to the tray and roast for an additional 10 minutes until the vegetables are tender and lightly browned.
While the vegetables are roasting, bring a pot of water to a boil and cook the egg white noodles according to the package instructions until al dente, then drain.
In a large skillet over medium-high heat, brown the ground turkey with the remaining olive oil, dried oregano, and garlic powder until the meat is fully cooked through.
In a small blender or food processor, pulse the cottage cheese and lemon juice together until the mixture is completely smooth and creamy.
Add the cooked egg white noodles and the roasted vegetables into the skillet with the turkey, tossing gently to combine all components.
Remove the skillet from the heat and stir in the blended cottage cheese sauce until the noodles and vegetables are evenly coated.
Divide the mixture into bowls and top each with fresh avocado slices before serving.