Add a few pinches of cream tartar to make it set nice. (not enough will make it runny.)
Pour into your pie dish and refridgerate!
Depending on the size of your crust, you may need to use more sweetened condensed milk to fill the pie up. I usually use 1 can, + 1/2 can. I always let mine set overnight. You can top it with anything you wish like whipped cream, or lemon wedges for garnish. I give one to each of my neighbors as sweet gifts. I promise you will love it!