Prep the apple. Core and dice one medium apple into small cubes.
No need to peel unless you prefer it. Smaller pieces cook faster and soften nicely.
Warm the pan. Place a medium saucepan over medium heat. Add 1 teaspoon coconut oil or a splash of water for an oil-free option.
Sauté the apple. Add the diced apple and a pinch of salt.
Cook for 2–3 minutes, stirring occasionally, until the edges start to soften. Sprinkle in 1/2 teaspoon cinnamon and stir to coat.
Add liquid and oats. Pour in 1 cup water and 1 cup non-dairy milk. Stir in 1 cup rolled oats.
Bring to a gentle simmer.
Simmer and stir. Reduce heat to low and cook for 6–8 minutes, stirring every minute or so. The oats should thicken and the apples will turn tender. If it gets too thick, add a splash of milk.
Sweeten and scent. Stir in 1–2 teaspoons maple syrup and 1/2 teaspoon vanilla extract.
Taste and adjust cinnamon or sweetness as needed.
Serve with texture. Spoon into bowls and top with a handful of chopped nuts for crunch. Add chia or hemp seeds for protein, and a drizzle of almond butter if you want extra richness.