Cook the Potatoes:
Boil the diced potatoes in salted water for 10-12 minutes until tender. Drain and set aside.
Cook the Sausage:
In a large skillet, heat 1 tablespoon of olive oil over medium heat. Cook the sausages until browned and cooked through, about 7-10 minutes. Remove from the skillet and slice into bite-sized pieces.
Sauté the Leeks:
Add the remaining tablespoon of olive oil to the skillet. Sauté the sliced leeks over medium heat for 5-7 minutes until softened and slightly caramelized.
Combine the Ingredients:
Add the boiled potatoes to the skillet with the leeks, seasoning with garlic powder, salt, and pepper. Cook for another 5 minutes to crisp up the potatoes.
Add Sausage and Mustard:
Return the cooked sausage to the skillet and stir everything together. Drizzle Dijon mustard over the mixture and toss until well-coated. Cook for an additional 2-3 minutes, until everything is heated through.
Serve:
Garnish with fresh herbs like thyme or parsley, if desired, and serve hot.