I created a report by using the QB "Bills and Applied Payments" report:

1. Go to Reports, then type Bills and Applied Payments in the search bar.
2. Under Report Period, select the date you made the payment for start and end date.  This will populate the payment as well as all bills paid with that payment.
3. Go to Customize, Filter.  Select the vendor you paid.
4. Go to Header/Footer and put your desired report name, add logo, etc.
5. Run Report.
6. Go to the settings icon, and select date, num and amount.
7. This will give you a simple report to email to your vendor when you send your payment including the payment and bill dates, the bill or payment numbers and the total amounts

NOTE:  When I make an EFT payment, I put "EFT PAYMENT" in the "check number" box.  This will let your vendor know that the EFT payment is for the group of bills that you paid.  It lists the bills numbers under that column.