Bring a large pot of water to a boil. Add in soybeans (still in shells) to boiling water. Boil for 4 minutes. Drain. Rinse with cold water.
Remove each bean from it's pod. This takes some time if you have lots of soybeans. Removing the beans when the shells are still wet makes it easier. Keep the beans. Compost/discard the pods. Blot the beans with paper towels to remove any excess water.
Preheat oven to 350 degrees.
Spray a pan with nonstick spray. Place the beans in a single layer on pan. Sprinkle with sea salt.
Bake for 15 minutes. Stir the beans.
Bake for another 15 minutes. Stir the beans.
Repeat until they are roasted.
Beans will take 30 minutes-1.5 hours until they are done, depending on how wet they are, the amount, etc. It's best if you review them every 15 minutes to make sure they don't burn.