01 -
1 1/2 cups fresh or panko breadcrumbs.
02 -
1/4 cup plus 2 tablespoons whole milk.
03 -
1 1/2 pounds ground beef (85/15).
04 -
1 tablespoon fresh parsley, chopped.
05 -
1 teaspoon fresh thyme leaves.
06 -
1 teaspoon herbes de Provence.
07 -
1 teaspoon salt.
08 -
1/4 teaspoon black pepper.
09 -
1/2 large white onion, finely minced.
10 -
4 garlic cloves, minced.
11 -
3/4 cup Gruyere cheese, divided.
12 -
1 egg, beaten.
13 -
1 cup mozzarella cheese, shredded.
14 -
4 tablespoons olive oil.
15 -
2 tablespoons butter or ghee.
16 -
2 1/2 large white onions, sliced.
17 -
1/4 cup sherry or white wine.
18 -
1 1/2 tablespoons flour.
19 -
2 1/4 cups beef stock.