Drain the lupini beans. Rinse in a colander, then pat dry.
In a medium bowl, whisk together the lime juice, olive oil, chili powder, sea salt, and black pepper. Add the lupini beans and toss to coat.
To cook lupini beans in the air fryer: Arrange at the bottom of the air fryer basket. Air fry at 380 degrees F (193 degrees C) for 10 minutes, stirring halfway through.
To cook lupini beans in the oven: Arrange in a single layer on a baking sheet. Bake at 400 degrees F (204 degrees C) for 15 minutes, stirring halfway through.
