Preheat your oven to 400°F. This is an essential step to ensure that your pastry bakes up nice and golden.
Unfold the puff pastry on a lightly floured surface. It’s important to give it a little space to breathe as you prepare it.
Brush the pastry generously with the egg mixture. This not only helps with sticking but also gives a beautiful shine when baked.
Sprinkle the shredded cheddar-jack cheese and fresh cilantro across the pastry, leaving about half an inch along the edges. Be generous, but be mindful not to overfill.
Starting from one long side, roll the pastry up tightly, almost like a jelly roll. This helps create those delightful spirals inside the bites.
Press the seam of the pastry to seal it well. You wouldn’t want any filling to escape!
With a sharp knife, cut the rolled pastry into 20 half-inch slices. This is where your bites start taking shape!
Place the slices cut-side down onto two baking sheets. Give them a little space apart for even cooking.
Bake in the preheated oven for about 15 minutes or until they are golden brown. Keep an eye on them — you want that lovely color!
Once baked, gently flatten the hot pastries with a spatula. This helps release some steam and keeps them from getting too puffy.
Let them cool on wire racks for around 10 minutes. This cooling period allows the flavors to settle and makes them easier to handle.
In a medium bowl, combine corn, black beans, red onion, red bell pepper, jalapeño, ground cumin, and lime juice. Mix well to allow the flavors to meld.
In another medium bowl, use a fork to mash the avocado. Stir in the sour cream and a splash of lime juice. Season with salt and pepper to taste.
Top each pastry with about two teaspoons of the guacamole and one tablespoon of the topping mixture. Feel free to garnish with additional fresh cilantro if desired.