Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Finely dice the Yukon gold potato into small 1/4-inch cubes to ensure they cook quickly.
In a non-stick skillet over medium heat, add the olive oil and cumin seeds, toasting for 30 seconds until fragrant.
Add the ground turkey to the skillet, breaking it apart with a spatula, and cook until browned.
Stir in the diced potatoes, turmeric, garlic powder, sea salt, and black pepper; cover and cook for 5-7 minutes until potatoes are tender.
Cut each whole wheat tortilla into three long strips. Place a spoonful of the turkey-potato mixture at the end of a strip and fold diagonally into a triangle shape, tucking the end in.
Place the samosas on the prepared baking sheet and bake for 12-15 minutes, flipping halfway through, until the edges are golden and crispy.
While baking, prepare the chutney by blending the Greek yogurt, fresh cilantro, fresh mint, and lime juice in a small food processor until smooth.
Serve the hot samosas immediately with the zesty chilled chutney for dipping.