In a medium saucepan over medium heat, add the pecans, brown sugar, butter, cinnamon, and salt. Cook, stirring frequently, until the butter is melted and and the mixture comes to a gentle boil. Once boiling, cook for 2 minutes, then remove from the heat.
2 1/2 cups chopped pecans, 1 1/2 cups (300g) light brown sugar, 1 1/2 cups salted butter, 1/4 teaspoon salt, 1/4 teaspoon ground cinnamon