How to Make It
Stir together water, milk, oats, cherries, and kosher salt in bowl of a 6-quart programmable electric pressure cooker, such as an Instant Pot. Cover Instant Pot, and fasten lid. Lock and seal steam valve. Set to HIGH pressure for 4 minutes. (The pot will take about 15 minutes to come up to pressure before the cooking program begins.) When cooking program ends, carefully release pressure by turning Pressure Release to VENT. (Steam is fully released when pressure valve drops.) Remove lid.
Stir oats to incorporate any liquid on top; stir in 4 tablespoons brown sugar, butter, vanilla, and cinnamon until fully incorporated. Spoon about 3/4 cup oatmeal in each of 6 bowls. Sprinkle evenly with pecans and remaining 1 tablespoon brown sugar. Serve immediately.