Step 1: Prepare the Potatoes
Start by bringing a pot of salted water to a boil. Add the diced potatoes and cook until they are fork-tender, about 15 minutes. Drain the potatoes and let them cool slightly.
Step 2: Make the Filling
In a mixing bowl, combine the cooked potatoes, crumbled blue cheese, sour cream, olive oil, garlic powder, salt, and pepper. Mash the mixture together until it reaches a creamy consistency, leaving some small chunks of potato for texture.
Step 3: Preheat the Oven
Preheat your oven to 375°F (190°C) while you prepare the fillo shells.
Step 4: Fill the Fillo Shells
Place the fillo shells on a baking sheet. Carefully spoon the potato and blue cheese filling into each shell, filling them generously but not overflowing.
Step 5: Bake the Tartlets
Bake the filled shells in the preheated oven for about 15-20 minutes, or until the tops are golden brown and the filling is heated through.
Step 6: Garnish and Serve
Once baked, remove the tartlets from the oven and let them cool for a few minutes. Garnish with freshly chopped chives before serving. Enjoy your Potato Blue Cheese Tartlets warm!