In a medium saucepan set over medium heat, combine the water, steel-cut oats, ground flaxseed, dried cherries, and salt.
Bring the mixture to a boil, stirring occasionally to prevent the oats from sticking to the bottom of the pan.
Once boiling, reduce the heat to low and simmer for approximately 20 minutes, or until the oatmeal reaches the desired consistency. Stir occasionally during cooking.
Remove the saucepan from the heat.
Stir in 3 tbsp brown sugar, 1 tbsp toasted chopped hazelnuts, and the ground cinnamon until evenly incorporated.
Portion 1 c oatmeal into each serving bowl.
Top each serving with 1 tsp brown sugar, 1 1/2 tsp toasted chopped hazelnuts, and 1 tsp toasted hazelnut oil.
Serve warm.