Korean Beef Noodle Bowls

Name: Korean Beef Noodle Bowls
Cuisine: Asian, Korean
Ingredients: 1 lb. sirloin steak, thinly sliced*; kosher salt and freshly ground black pepper; 1 tablespoon olive oil; ¼ cup soy sauce; 2 tablespoons water; 1 teaspoon sriracha sauce; 1 teaspoon sesame oil; 1 tablespoon brown sugar; 1 small white onion, thinly sliced or finely chopped; 3-4 cloves garlic, minced; 1 teaspoon freshly minced or grated ginger; 2 packages ramen noodles (discard seasoning packets or save them for another use); ½ English cucumber or 2 baby cucumbers, thinly sliced (leave the peels on); 1 bunch green onions, chopped; Sesame seeds; Gochujang sauce (see note)