Roast the potatoes. Preheat oven to 425°F. Cut potatoes in half, toss with avocado oil, salt, and pepper, and place cut-side down on a baking sheet. Roast for 20–30 minutes, until tender and golden brown.
Cook the bacon and onion. In a large pot, cook bacon over medium heat until browned. Add onion and cook 4–5 minutes, until translucent.
Add the vegetables. Stir in broccoli and carrots and cook for 3–4 minutes. Add garlic and cook for 1 minute.
Blend the cottage cheese. Use an immersion blender to blend the cottage cheese until smooth and creamy.
Make the soup. Add cottage cheese, sour cream, and chicken broth to the pot. Stir and bring to a gentle simmer.
Add cheese and potatoes. Stir in cheddar until melted, then add the roasted potatoes. Lightly mash some potatoes for a thicker texture, if desired.
Season and serve. Season with salt and pepper to taste. Ladle into bowls and top with cheddar, bacon, green onions, and sour cream.