How to setup a lease option?

I have a rental property that I would like to lease option to a couple. They have 5K down and can pay $1500 mo. I owe 375K and the house is worth 395K. The payment is $1600 mo. How could I set this up? I was just going to rent it to them, but I thought a L/O may be a good idea. I am new to L/O so any and all ideas are welcome! I need the details of how you would handle this and where to get forms.