Chicken, Mushroom, and Brown Rice Slow Cooker Casserole

INGREDIENTS

20 oz

Chicken thigh(s) use, boneless skinless

1 cup

Carrot(s)

1 cup

Celery

1/2 lb

Cremini mushroom(s)

1 tsp

Sage, dried

2 cups

Chicken broth, canned reduced-sodium

1 tsp

Dijon mustard

2 tsp

Worcestershire sauce

3/4 cup

Brown rice medium-grain, long grain

1/2 tsp

Black pepper, freshly ground

1 tsp

Table salt

Spray(s) cooking spray

1 cup

(s) uncooked leek(s) white and pale green parts only, thinly sliced, washed carefully for grit