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)