Preheat the oven to 425°F. Rub the sweet potato halves with 1 teaspoon olive oil and place them cut-side down on a baking sheet. Roast for 25 minutes or until tender. Once cool, gently mash the insides without tearing the skins.
In a bowl, mix chickpeas, cucumber, parsley, and 1 tablespoon of lemon juice. Season with salt to taste and set aside.
In a small bowl, whisk together the miso paste, tahini, 1 teaspoon lemon juice, and 2 tablespoons water until smooth.
Heat 1 teaspoon of olive oil in a large skillet over medium-high heat. Add the bok choy and 1/4 cup water, sautéing until just wilted. Season with salt and pepper.
Spread the miso-tahini sauce onto plates. Top with sweet potato halves and stuff with sautéed bok choy. Add the chickpea mixture on top, then sprinkle with sesame seeds and Aleppo pepper flakes and serve.