Preheat the oven to 425 degrees and line a baking sheet with parchment paper.
Add all of the sweet potato ingredients to a large bowl and toss to combine. Transfer to the baking sheet and bake for 25 minutes, flipping after 15 minutes.
Meanwhile, bring a large pot of water to a boil. Add the pasta and cook until al dente. Drain and rinse with cold water. Set aside.
Add all of the dressing ingredients to a food processor. Pulse until combined. Taste and adjust seasonings as needed. Set aside.
Add the pasta, sweet potatoes and remaining salad ingredients to a large bowl. Drizzle the dressing over everything and toss to coat evenly. Top with avocado slices & serve at room temperature or cold.