01 - Preheat oven to 300°F. Spread buckwheat groats evenly on a baking sheet and roast for 15 minutes, stirring halfway through, until lightly golden and fragrant.
02 - In a medium saucepan, mix roasted buckwheat, almond milk, water, maple syrup, vanilla extract, ground cinnamon, and sea salt until well blended.
03 - Bring mixture to a simmer over medium heat, then reduce to low, cover, and cook for 20 minutes, stirring occasionally.
04 - Stir in mixed berries and continue cooking uncovered for 5 to 10 minutes, stirring gently, until buckwheat is tender and consistency is creamy.
05 - Adjust sweetness if desired. Spoon porridge into bowls and garnish with optional toppings.