How to Make It
Preheat oven to 400°F. Place jicama in a large bowl with 2 Tablespoons of the oil, 1/4 teaspoon of the salt, paprika, garlic powder, onion powder, and black pepper; toss to coat. Spread in a single layer on a rimmed baking sheet. Bake at 400°F for 35 to 40 minutes, tossing occasionally, until golden-brown and tender.
While fries bake, prepare poblano-tahini sauce by combining remaining 2 Tablespoons oil, 1/2 teaspoon salt, poblano chile, cilantro, lime juice, tahini, 2 Tablespoons water, garlic, and cumin in a blender; blend until smooth. Serve fries with sauce.