The Best Blueberry and Strawberry Oatmeal Crumble Bars Ever! » Salads for Lunch

Ingredients

• 1 cup quick oats
• 3/4 cup whole wheat flour
• 1/3 cup light brown sugar
• 1 tablespoon cinnamon
• 1/4 teaspoon salt
• 6 tablespoons unsalted butter — melted
• 1 1/2 cups strawberries — diced and divided
• 1/2 cup blueberries
• 1 teaspoon cornstarch
• 1 tablespoon lemon juice
• 1 tablespoon granulated sugar — divided
• 1/2 cup powdered sugar
• 1/2 teaspoon pure vanilla extract
• 1 tablespoon milk