Korean Mushroom Kebabs

Name: Korean Mushroom Kebabs
Ingredients: 12 ounces large white mushrooms, cleaned, cut in 1/2-inch slices; 2 bunches large green onions, white parts cut in 1/2-inch pieces, chop1/4 cup of the green parts & set aside; 2 medium green peppers, deseeded, cut into 1 1/2-inch squares; 1⁄4 cup soy sauce (I use lite); 3 tablespoons sugar; 1 tablespoon dark sesame oil; 4 -6 garlic cloves, finely chopped; 2 tablespoons sesame seeds, toasted, divided; 1⁄2 teaspoon black pepper; bamboo skewer, soaked in water for at least an hour