Horchata Overnight Oats

Ingredients
Method
Stir 3 cups old-fashioned oats, 2½ cups rice milk, ¼ cup pure maple syrup, 1 Tbsp. vanilla bean paste or vanilla extract, 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt, ½ cup coarsely chopped unsalted roasted almonds, and 1 tsp. ground cinnamon in a medium bowl to combine. Transfer to airtight container; cover and chill at least 12 hours.
When ready to serve, divide overnight oats among bowls and top each with puffed rice cereal (if using), more almonds, and a sprinkle of cinnamon. Do Ahead: Oats can be made 5 days ahead. Keep chilled.