Cut the sweet potatoes into roughly ½-inch cubes and heat a large skillet over medium heat.
Once hot, add oil, sweet potatoes, salt, and pepper, and stir to coat. Arrange in a single layer to ensure even cooking, and place a lid on top to steam.
Cook the potatoes for 3-4 minutes. Then uncover and flip them to ensure even cooking.
Continue cooking until golden brown on both sides and tender, for about 10-15 minutes total. During the last 5 minutes of cooking, add kale to the skillet to wilt slightly.
Whisk the tahini, lemon juice, garlic, and cumin together. Add water 1 teaspoon at a time until smooth and pourable.
To serve, divide kale and potato mixture between serving plates and top with radishes, avocado, hemp seeds and cilantro.
Serve with the tahini dressing on the side and enjoy immediately.