In a small bowl, combine all streusel ingredients until crumbly. Lay in a single layer on a parchment paper-lined baking sheet. Bake streusel at 350F 8-10 minutes until a light golden brown.
Steel-Cut Oatmeal
In a medium saucepan, bring milk to a simmer. Whisk in oats and salt. Reduce heat to low and cover saucepan. Let simmer over low heat 15-20 minutes, (whisking every few minutes) until oatmeal is smooth and creamy.
Remove oats from heat and stir in brown sugar, vanilla, and blueberries. Spoon oatmeal into bowls and top with streusel and additional blueberries if desired. Enjoy!