From: April Bloomfield's A Girl and Her Pig
Serves 2 to 3
1 1/2 cup whole milk, plus a few generous splashes
1 1/2 cup water
1 1/2 teaspoon Maldon, or other flaky sea salt (if using finer salt, start with 1/2 teaspoon and add to taste)
1/2 cup rolled oats
1/2 cup steel-cut oats
About 2 tablespoons sugar (maple, brown, or white) or maple syrup
Combine the milk, water, and salt in a medium pot (a 2-quart pot should do it) and set over high heat.
As soon as the liquid comes to a gentle simmer, add both kinds of oats and lower the heat to medium.
Cook the oats at a steady simmer, stirring frequently and lowering the heat as necessary to maintain the simmer.
After about 20 minutes at the simmer, the rolled oats will have turned a bit mushy, while the steel-cut oats will be just tender and pop when you bite them.
Taste for seasoning -- it should be on the salty side. Add sugar or syrup.
Spoon the porridge into warm bowls and let it sit for a minute.
Then carefully pour a little cold milk around the edges of each bowl, so it pools all the way round.
Sprinkle a five-fingered pinch of sugar or drizzle the syrup in the center of each and let it melt, then serve right away.
See also: http://www.thekitchn.com/how-to-cook-steelcut-oats-for-134185