Preheat your oven to 200°C (390°F) and line a rimmed baking sheet with parchment paper.
Measure out 2 cups of frozen edamame and transfer them directly into a mixing bowl—no need to thaw.
Drizzle the edamame with a tablespoon of olive oil and toss gently until evenly coated. This helps them crisp up during roasting.
Add the coarse sea salt, smoked paprika, and garlic powder to the bowl. Toss again to distribute the spices evenly over the beans.
Spread the coated edamame in a single layer on the prepared baking sheet, making sure they aren’t crowded. This ensures even roasting and maximum crunch.
Roast in the oven for 15-20 minutes, shaking the pan halfway through to promote even browning. You’ll notice the beans turn golden and develop a crackling sound as they crisp up.
Once golden and blistered, remove the baking sheet from the oven and sprinkle with lemon zest and toasted sesame seeds, if using. Let them cool on the sheet for 5 minutes to further crisp up.
Transfer the roasted edamame to a bowl or plate, and enjoy immediately for the best crunch and flavor.