Wash and dice the Russet potato into small, uniform half-inch cubes to ensure even cooking.
Heat the olive oil in a medium cast-iron or non-stick skillet over medium-high heat.
Add the diced potatoes to the skillet in a single layer and season with half of the salt, pepper, and garlic powder.
Cook the potatoes for 8-10 minutes, stirring occasionally, until they are tender and the edges are golden and crispy.
Push the potatoes to the outer edges of the skillet and add the ground turkey sausage, diced onions, and bell peppers to the center.
Break up the sausage with a wooden spoon and cook until browned and the vegetables have softened, about 5-6 minutes.
Mix the potatoes back into the center with the sausage and vegetables, seasoning with the remaining spices.
Use the back of a spoon to create a small well in the center of the mixture and crack the egg into it.
Reduce heat to medium-low, cover the skillet with a lid, and cook for 2-3 minutes until the egg white is set but the yolk remains runny.
Remove from heat, garnish with freshly chopped parsley, and serve immediately directly from the skillet.