01 -
Warm up canola or vegetable oil in a skillet over medium heat. Fry the sliced onions until they're crisp and golden. Let them drain on paper towels, and then set them aside.
02 -
Melt butter in a medium pan over medium heat. Cook the onion and garlic until soft and fragrant. Stir in the flour, then slowly pour in the chicken broth and milk while whisking. Continue cooking until it thickens.
03 -
In a big bowl, stir together the thawed potatoes, the shredded cheese, the sour cream, and the sauce you just made. Mix well until everything’s combined.
04 -
Turn your oven to 180°C (350°F) to preheat. Grease a 9x13-inch pan, pour the potato mix in, and spread it out evenly. Bake it uncovered for 30 to 35 minutes.
05 -
Take the pan out of the oven, sprinkle the crispy onions on top, and put it back in. Let it bake for another 10 minutes until the top is nice and golden.
06 -
Give the dish about 5–10 minutes to cool before you serve it up.