Use pinhead oatmeal and do not overcook. For the amount I have every morning for breakfast it takes 5 minutes in my microwave, stir and leave till it cools a bit. Salt is added before cooking of course.
It can also be done in a pan but takes longer and needs attention from time to time. Eat with milk.
Oatly do a Chocolate Oatmilk, just imagine it, chocolate porridge with sliced banana and a big spoonful of honey