Prep the bananas: Peel one banana and slice it into rounds for garnish and texture; peel the other and mash it in a small bowl with a fork until mostly smooth. Mashing one banana releases its liquid and natural sugars, which will dissolve into the oats and create a creamy, custardy texture without extra sweetener; keeping slices gives you fresh banana texture and a pretty finish.

Toast the walnuts: Heat a small dry skillet over medium heat and add the chopped walnuts (and 1 tsp butter or oil if you like richer flavor). Toast, stirring often, 2–3 minutes until fragrant and lightly browned. Toasting concentrates the nut’s oils and brings out a deeper, more complex flavor — don’t walk away because nuts can burn quickly.

Bloom the cinnamon: In a medium saucepan over medium-low heat, pour the almond milk and sprinkle in the ground cinnamon and a pinch of salt. Warm gently (do not boil) for about 1 minute to bloom the cinnamon — heating spices in liquid releases their volatile oils and aromas, making the cinnamon taste brighter and more integrated.

Cook the oats: Add the rolled oats to the warmed almond milk, stir, and bring to a gentle simmer. Reduce heat to low and cook uncovered, stirring occasionally, 6–8 minutes until the oats are tender and the mixture is creamy. Stirring occasionally prevents sticking and helps the oats release their starches for a velvety mouthfeel. If you prefer looser oatmeal, cook less; for thicker, cook a minute longer or let rest off heat.

Finish with banana and almond butter: Remove the pot from the heat and stir in the mashed banana and the almond butter until fully incorporated. The warm oats will melt the almond butter and dissolve the mashed banana, creating extra creaminess and natural sweetness while adding protein and healthy fats.

Adjust texture and taste: Taste and, if needed, add a tiny pinch more salt to heighten sweetness or a splash (1–2 tablespoons) of almond milk if the porridge is too thick. Salt amplifies flavor and balances sweetness — a small touch makes a big difference.

Plate and garnish: Divide the oatmeal between two bowls. Arrange the banana slices on top, scatter the toasted walnuts, and finish with a light dusting of cinnamon. The contrast between the hot, creamy base and the crunchy walnuts plus cool banana slices makes each bite interesting.

Optional finishing flavors: For a glossy finish and a flavor boost, drizzle a teaspoon of almond butter or a little honey/maple syrup (if not strictly sugar-free) over each bowl. If you used honey, add it at the end so it retains its floral notes.