Chop 3/4 cup of the pecans into a coarse smaller size. Save the remaining as whole pecan halves.
Place a medium saucepan over medium heat, add and melt the butter. Then add the brown sugar, vanilla, and kosher salt, whisking constantly.
Here is the link for how to roast and prepare the squash or pumpkin if you are doing it from scratch: Brown Butter Honeynut Squash Cake