Preheat the oven to 350 degrees F. Line a 9x13 inch pan with heavy duty aluminum foil (for easy removal).
For the Crust:
Mix flour and brown sugar together in a medium bowl. Cut butter in with a fork or pastry blender until crumbly. Spread mixture evenly in the bottom of the pan and pat it down. Bake for 15 minutes. Meanwhile, prepare the middle layer.
For the Cream Cheese Layer:
With an electric mixer, beat cream cheese and sugar together in a large bowl until smooth. Add eggs and vanilla and beat until combined. Pour over the crust.
For the Strawberry Layer:
Spread the diced strawberries evenly over the cream cheese mixture.
For the Topping:
Combine flour, brown sugar, oats, and cinnamon in a medium bowl. Cut butter in with a fork or pastry blender until crumbly. Spread evenly over the strawberries.
Bake for 45-55 minutes until center is set. Allow bars to cool for about 30 minutes and then refrigerate at least 3 hours or overnight.
Remove the cheesecake by lifting the foil out and then cut into 35 square bars.
Drizzle with strawberry sauce (recipe below) and garnish with fanned strawberries.
Recipe Source: Adapted from Borton & Sons recipe in Enjoy Cooking The Costco Way magazine cookbook