In a large pan over medium heat, heat the olive oil until shimmering, then add the onion.
2. Step
Sauté the onion until golden and translucent, about 5 minutes.
3. Step
Add the garlic, ground beef, 1 teaspoon of salt, and ½ teaspoon of pepper. Break down with a spatula and cook until brown and cooked through.
4. Step
Add the spinach and stir until wilted. Remove the pan from the heat and set aside.
5. Step
Peel the potatoes and grate.
6. Step
Place the shredded potatoes in a kitchen towel over a bowl and wring out the water.
7. Step
In another large bowl, add the shredded potato, egg, remaining teaspoon of salt, remaining ½ teaspoon of pepper, onion powder, garlic powder, and Parmesan cheese. Mix until combined.
8. Step
Line a small bowl with plastic wrap.
9. Step
Place 1 cup (250 g) of the potato mixture in the bowl and use a spoon to spread the potatoes around the sides of the bowl.
10. Step
Sprinkle cheddar cheese on top of the potatoes and add a large spoonful of the beef mixture, being careful not to overfill.
11. Step
Pick up the sides of the plastic wrap and close the potatoes, twisting to create a sealed ball.
12. Step
Chill for 30 minutes.
13. Step
Preheat oven to 375°F (190°C).
14. Step
Place the potato balls on a greased baking sheet and bake for 35-40 minutes, or until the potatoes are crispy and brown.
