Toast oats (1-2 min): Melt the butter in a medium saucepan over medium heat. Add the steel cut oats and salt, toast for 1-2 minutes, until slightly nutty.
1 Tablespoon unsalted butter, 1 cup steel cut oats, 2 cups water, 1 teaspoon kosher salt
Boil and simmer (2 min): Pour in the water (or milk) and bring to a boil over high heat. Reduce to low, cover, and simmer for 1 minute then remove from the heat and cool slightly.
Soak (8-12 hrs): Divide into 4 jars or transfer to one big bowl. Cover and refrigerate for 8-12 hour, until the oats absorb all of the liquid and are softened and creamy. They should still have some chew to them.
Serve: To serve chilled, stir, add splash of milk, and top as desired. For warm oats, stir in a splash of milk and microwave for 1-2 minutes. Top and enjoy!
Optional toppings: chia seeds, flax seed, banana, berries, apples, nut butter, cinnamon, maple syrup, or dried fruit