Please Help: Needed T-SQL Query To Get The MIN(LastName)+' - '+MAX(LastName) For Each LastName Initial In The Db

My users wanted to view all the "FIRST and LAST" Lastname in each of the LastName initial in the database.
I have been trying to join/connect/subquery/merge/etc the following two set of codes but without good results.

Fist, i get all the lastname initials:
SELECT DISTINCT LEFT(LastName, 1) AS LastNameInitial
FROM Persons.Persons
ORDER BY LastNameInitial

Results to:
--------------------------------------
A
B
C
D
...
Y
Z


Then, i want to get all the FIRST and LAST LastName for each LastNameInitial
I only have this partial idea (can't get the rest):
--------------------------------------
SELECT MIN(LastName) + ' - ' + MAX(LastName) AS LastNameGroup
FROM Persons.Persons
WHERE (LastName LIKE 'A' + '%')


Only results to:
--------------------------------------
Abad - Ayun


MY USERS WANTED TO HAVE THIS RESULT (In a single query):
------------------------------------------
Abad - Ayun
Babaran - Buted
Cabaccan - Curugan
Dacquil - Durwin
Eda - Evangelista
...
Yadao - Yumul
Zalun - Zunajo



Thanks in advance for your help.
God bless!