Preheat your oven to 400°F.
In a small bowl, mix together the olive oil, melted butter, minced garlic, oregano, coriander, paprika, cumin, allspice, chili powder, salt, and black pepper.
Place the potatoes in a pot of water and salt the water.
Bring the pot to a boil over medium-high heat and cook for 20 to 25 minutes until the potatoes are tender when pierced with a fork.
Drain the water and let the potatoes sit in the pot for 5 minutes to dry.
Transfer the potatoes to a non-stick baking tray.
Flatten the potatoes using the bottom of a flat cup or small plate. If they stick, spray a little oil on the surface first.
Coat the potatoes evenly with the marinade from earlier, making sure to get underneath for crispiness.
Bake in the oven for 45 to 55 minutes until golden and crispy all over.
Once out of the oven, top with feta cheese, dill, tzatziki, and pepperoncinis if desired. Remember, toppings are optional!