SQL & PL/SQL :: Convert Object Return Type Columns

I have created a object type as

create type emp_obj_dtl as OBJECT (ename varchar2(50),mgr NUMBER)
create type emp_dtl_obj_typ as TABLE of emp_obj_dtl

Using the these object i have created on function as

CREATE OR REPLACE FUNCTION emp_test_func (peno NUMBER)
RETURN emp_dtl_obj_typ
AS
lv_emp_dtl emp_dtl_obj_typ := emp_dtl_obj_typ ();
BEGIN
SELECT emp_dtl_obj_typ(emp_obj_dtl (ename, mgr))
INTO lv_emp_dtl
FROM emp
WHERE empno = peno;

RETURN lv_emp_dtl;
END;

Now if i am executing query as

SELECT empno, emp_test_func (empno) emp_dtls
FROM emp

It is returning me the data as

EMPNO | EMP_DTLS
7500 | (DATASET)
7382 | (DATASET)
7569 | (DATASET)
7800 | (DATASET)

But I want the result set as

EMPNO | ENAME | MGR
7500 | SMITH | 7863
7382 | JAMES | 7896
7569 | KING | 7856
7800 | SANGR | 7456

How to get the resultset as above.