Preheat oven to 400°F. Combine sweet potatoes, 1 1/2 teaspoons oil, 1/2 teaspoon chili powder, 1/8 teaspoon salt, and 1/4 teaspoon black pepper in a bowl; toss. Arrange sweet potato mixture on one side of an aluminum foil–lined baking sheet. Place bell pepper on other side of pan; drizzle with 1 1/2 teaspoons oil, and toss to coat. Bake until potatoes are tender and peppers are lightly charred, about 30 minutes, stirring potatoes once halfway through. Remove pan from oven. Cut bell pepper into strips. Cook almonds in a small skillet over medium until toasted, 2 to 3 minutes. Add 1 teaspoon oil, remaining 1/2 teaspoon chili powder, 1/8 teaspoon salt, 1 teaspoon rind, and sugar; cook, stirring occasionally, 1 minute. Whisk together remaining 5 teaspoons oil, remaining 3/4 teaspoon salt, remaining 1/4 teaspoon black pepper, remaining 1 teaspoon rind, juice, and cilantro in a bowl. Divide quinoa among 4 bowls; top evenly with kale, sweet potatoes, and bell pepper. Drizzle with juice mixture; top evenly with coated almonds, Cotija, and avocado. Serve with lime wedges.