Hearty Swiss Potato Casserole
Serve this hearty Swiss cheese potato casserole, which consists of potatoes that have been thinly sliced and are covered in creamy gravy, Gruyere, garlic, scallions, and rosemary.
Melt butter in a saucepan over medium-low heat.
Let simmer for 1 minute.
Add flour 1 tablespoon at a time whisking constantly until completely incorporated 5 to 8 minutes.
Add 1 cup water slowly and whisking constantly to avoid clumping.
Remove from heat.
Whisk remaining 2/3 cup water together with cornstarch in a small bowl.
Add slurry to the gravy; whisk to combine.
Preheat the oven to 375 degrees F (190 degrees C).
Stir the gravy briefly; season with salt and pepper.
Add thyme and rosemary.
Stir in Swiss cheese and Gruyere cheese.
Add potatoes scallions and garlic; stir well until potato slices are separated and coated with gravy.
Pour mixture into an 8-inch square baking dish.