Banana Cocoa Oat Squares

Ingredients: * 1 sheet puff pastry (thawed) * 4 oz cream cheese (softened) * 3–4 tbsp powdered sugar (to taste) * 1 tsp vanilla extract * 1–2 tsp cornstarch * Fresh strawberries (sliced) * 1 egg (for egg wash) * Optional: coarse sugar for edges ⸻ 👩‍🍳 Instructions: 1. Preheat oven