Mix 1 cup of rolled oats and 1 cup of warm, filtered water together in a bowl. Add 2 tablespoons of acid such as buttermilk, whey, yogurt, lemon juice, or vinegar. Mix well, cover, and let sit in a warm place overnight or up to 24 hours.
The next morning, bring 1 cup of filtered water and 1/2 teaspoon of sea salt to a boil on your stove in a large pot.
Add the soaked oats to the boiling water, reduce heat, cover, and simmer for up to 3 minutes, stirring occasionally.
Then take the pot off the heat and add in any additional ingredients you desire. Options include milk, fresh or frozen fruit, sugar, maple syrup, and fruit butters. Mix well and serve while still warm.