Let’s dive into the step-by-step process for this family favorite:

1. Preheat your oven to 375°F (190°C).
2. In a skillet, heat olive oil over medium heat. Add the diced onion and cook until translucent, about 3 minutes.
3. Add minced garlic and cook for another minute, until fragrant.
4. Add ground beef to the skillet, breaking it apart with a spoon. Cook until browned, about 5-7 minutes. Season with salt, pepper, and paprika.
5. In a baking dish, arrange a layer of sliced potatoes. Top with half of the beef mixture and a sprinkle of cheese.
6. Repeat the layers, ending with a layer of potatoes on top.
7. In a small saucepan, melt butter and whisk in milk. Pour this mixture over the layered potatoes and beef.
8. Cover with foil and bake in the preheated oven for 45 minutes.
9. Remove foil, sprinkle remaining cheese on top, and bake uncovered for another 10-15 minutes until cheese is bubbly and golden.
10. Let it cool for a few minutes before serving. Enjoy the delicious aromas filling your kitchen!

Pro tip: If you ever find yourself with a little extra time, caramelize the onions for a deeper flavor. It’s a small step that adds a lot of love to the dish.