Prepare oatmeal according to package directions for 2-4 servings.
Meanwhile, in a small saucepan over medium-high heat, combine the blueberries, water, lemon juice, brown sugar and cornstarch. Bring to a boil, stirring occasionally. Reduce heat, simmer for 3-5 minutes or until thickened.
Serve oatmeal topped with blueberries, whipped cream and slice almonds.