Preheat oven to 375 degrees.
Spread thawed edamame onto a clean dish towel to dry. Place in a medium bowl.
In a small bowl, stir together oil, basil, chili powder, onion salt, cumin, paprika and black pepper.
Drizzle mixture over soybeans and toss to coat well.
Arrange beans in a single layer in a shallow baking dish.
Roast, uncovered, for 12 to 15 minutes, stirring once, until soybeans begin to brown. Refrigerate any leftovers.