Preheat the oven to 425°F (220°C).
Toss the diced sweet potatoes with one tablespoon of olive oil, smoked paprika, salt, and pepper.
Spread the sweet potatoes on a baking sheet in a single layer. Roast for 25-30 minutes, flipping halfway through.
While the sweet potatoes are roasting, rinse the quinoa under cold water.
Cook the quinoa according to package instructions, usually a 2:1 ratio of water to quinoa.
In a separate skillet, heat the remaining tablespoon of olive oil over medium heat. Add the chopped kale and sauté until wilted, about 5-7 minutes.
Once everything is prepared, assemble the harvest bowl: start with a base of quinoa, top with roasted sweet potatoes and sautéed kale.
Finish with sliced avocado and a drizzle of lemon juice on top.