Ham and Cheese Breakfast Casserole

INGREDIENTS

4 cups

(day-old, challah or brioche bread, cut into 1-inch cubes.)

2 tbsp

olive oil

1 tbsp

unsalted butter

medium sweet yellow onion (peeled and diced)

1/2 tsp

kosher salt

1/2 tsp

freshly ground black pepper

1/4 tsp

granulated sugar

1/2 lb

thinly-sliced good deli ham (roughly cut)

large eggs

1 1/2 cups

milk or half ‘n half

1/2 tsp

dry mustard

1/4 tsp

grated nutmeg

2 tsp

fresh thyme leaves (minced)

Salt & Pepper (to taste)

1 cup

shredded Gruyere or Swiss cheese