Toast the chopped pecans in a dry skillet over medium heat until fragrant and lightly browned, about 3-4 minutes, stirring frequently. Transfer them to a small bowl and set aside.
Add oats and water (or milk) to a saucepan and bring to a gentle boil over medium heat. Reduce the heat to low and simmer, stirring occasionally, until the oats are soft and the mixture is thickened, about 5-7 minutes.
Stir in the cinnamon, a pinch of salt, and half of the syrup into the cooked oats. Mix until well combined and heated through.
In a small pan, melt the butter over medium heat and pour in the remaining syrup. Continue cooking, stirring constantly, until the syrup begins to bubble and caramelize slightly, about 2-3 minutes.
Add the toasted pecans to the caramel mixture and stir quickly to coat them evenly. Cook for another 1-2 minutes until the pecans are glossy and slightly sticky. Remove from heat and set aside.
Spoon the warm oatmeal into bowls and top generously with the caramelized pecans and their syrupy coating. Drizzle with additional syrup if desired for extra sweetness.
Enjoy the breakfast bowl while warm, relishing the combination of creamy oats, crunchy toasted pecans, and a sweet, caramel aroma that fills the room.