Made with all the key ingredients of Southern-style peach praline pie, minus the crust, this confection is as sweet as summer itself.
Melt the butter in a small saucepan over medium-low heat. Add the brown sugar, water, and pecans and gradually bring the mixture to a boil, stirring occasionally. Reduce the heat and simmer the sauce for 5 minutes, stirring often. Remove the pan from the heat and stir in the vanilla extract. Then transfer the mixture to a small serving bowl and allow it to cool until lukewarm, stirring occasionally (it will thicken in the process). You'll end up with about 1 cup of sauce, enough for 4 to 6 sundaes.
For each sundae, scoop frozen yogurt into a chilled serving dish and then top it with a few peach slices and a generous drizzling of the praline sauce.