Preheat oven to 400 degrees.
In a small bowl, combine olive oil, 1 teaspoon cumin, ½ teaspoon smoked paprika, ½ teaspoon garlic powder, and ½ teaspoon salt.
Peel and dice sweet potatoes. Add to a large bowl with the olive oil seasoning. Toss to coat.
Spread the sweet potatoes on a baking sheet in a single layer.
Bake for 20 minutes. Remove and set aside.
In the meantime, cook quinoa as directed on package.
Prepare additional ingredients: Drain and rinse beans and corn. Slice roasted red peppers and onion. Dice avocado. Set these ingredients aside separately.
In a small food processor or blender add dressing ingredients. Blend until smooth.
Assemble by adding potatoes, quinoa and black beans to each of 4 bowls, add additional ingredients as desired. Drizzle with dressing. Serve with sliced apples.