Bring a saucepan of water to the boil (the water should just cover the edamame later). As soon as the water boils, add salt and cook the edamame in it for about 4 minutes, then drain the water through a sieve.
In the meantime, mix the marinade in a small bowl. Mix together the soy sauce, maple syrup, roasted sesame oil, finely grated ginger, chopped chilli pepper and salt.
Heat a pan and roast the sesame seeds without oil and while stirring until they start to smell. Pour the sesame seeds into a bowl and set aside.
Heat the olive oil in the same pan. Briefly fry the garlic while stirring. Then add the marinade and edamame and stir-fry for about 1 minute. Pour edamame into a bowl and serve sprinkled with the toasted sesame seeds.