01 -
3 pounds Yukon Gold potatoes, sliced 1/8-inch.
02 -
1/2 medium yellow onion, thinly sliced.
03 -
3 tablespoons unsalted butter.
04 -
1/4 cup all-purpose flour.
05 -
2 cups whole milk.
06 -
1 cup vegetable broth.
07 -
4 garlic cloves, grated.
08 -
1 tablespoon fresh thyme leaves.
09 -
2 teaspoons sea salt.
10 -
1/2 teaspoon black pepper.
11 -
1 1/2 cups cheddar cheese, grated.
12 -
Butter for greasing pan.