1. Preheat the oven to 360°F and line a large baking sheet with parchment paper.

2. Let the puff pastry sit at room temperature for 15 to 20 minutes so it unfolds without cracking. Lightly flour your work surface and unroll the pastry.

3. Slice the pastry lengthwise into 2 long strips, then cut each strip into 12 equal rectangles for a total of 24 pieces.

4. Pat the feta dry with paper towels. Cut it into 12 evenly sized pieces.

5. Arrange 12 pastry rectangles on the prepared baking sheet. Place one piece of feta in the center of each rectangle.

6. Spoon about 1 teaspoon of caramelized onion spread, cranberry sauce, or spicy honey over each feta piece.

7. Top each bite with another pastry rectangle. Press the edges together with your fingers or seal with a fork.

8. Brush the tops with beaten egg and sprinkle with your choice of seeds or chopped nuts.

9. Bake for about 20 minutes, or until the pastry is puffed and golden brown.

10. Let the bites cool for 5 minutes before serving warm.