INGREDIENTS
8 oz
Pancetta
2 tsp
Thyme, fresh leaves
1
Yellow onion, medium
6
Eggs, large
1/2 tsp
Mustard, dry
1/4 tsp
Black pepper, freshly ground
1/4 tsp
Granulated sugar
3/4 tsp
Kosher salt
1/4 tsp
Nutmeg
2 tbsp
Olive oil
4 cups
Challah or other egg-enriched bread, loosely packed day-old
1 cup
Gruyere cheese, grated
1 1/2 cups
Whole milk