How to Make It
Prick potatoes all over with a fork; place on a microwave-safe plate, and microwave at HIGH just until tender, about 5 minutes. Cut into 1/2-inch-thick rounds.
Whisk together almond butter, water, and 1 tablespoon lemon juice in a bowl. Set aside.
Brush potato slices on 1 side with 1 tablespoon oil. Heat a large skillet over medium-high. Working in batches, cook potato slices, oil side down, until golden brown, 2 to 3 minutes.
Combine chickpeas, arugula, salt, pepper, remaining 2 tablespoons juice, and 1 tablespoon oil in a large bowl. Divide chickpea mixture among 4 plates; top with sweet potato slices. Drizzle with almond butter sauce.