What was Elisha's first miracle after Elijah was taken?

Answer: Parted the Jordan

Elisha struck the water with Elijah's cloak and the Jordan parted.

“Then he took the cloak of Elijah that had fallen from him and struck the waters. “Where now is the LORD, the God of Elijah?” he asked. And when he had struck the waters, they parted to the right and to the left, and Elisha crossed over.”— 2 Kings 2:14 (BSB)