Steak Frites with Shallot Pan Reduction

INGREDIENTS

1 3/4 lb

baking potatoes (about 2 large potatoes), peeled and cut into 1/2-inch sticks

Cooking spray

3/4 tsp

kosher salt, divided

2 tsp

chopped fresh thyme, divided

1 lb

boneless sirloin steak, trimmed

1/2 tsp

freshly ground black pepper, divided

2 tbsp

finely chopped shallots

2 tbsp

brandy

3/4 cup

less-sodium beef broth

1 tbsp

Dijon mustard

1 1/2 tsp

butter