Overnight Maple Walnut Oats

½ cup (40 g) old-fashioned oats, gluten-free

1 tsp chia seeds

2 tbsp (15 g) raw walnuts, chopped

½ cup (120 ml) unsweetened almond milk

1 tbsp (15 ml) pure maple syrup, more or less to taste

Small pinch of salt

Toppings, such as hemp seeds, ground flaxseed, sliced banana, cacao nibs, etc.