Dice the potatoes and onion.
Blanch the potatoes in boiling water for 5 minutes.
Heat olive oil in a pan and sauté the onion and potatoes.
Add the rice cakes and milk, then bring to a boil.
Stir in the rosé sauce, gochujang, and minced garlic until well mixed.
Top with mozzarella cheese, cover with a lid, and cook until the cheese is melted.