Steak and Mushroom Pot Pie

I found this online and changed it a little.  Really yummy!

2 lbs steak (cheap steak is just fine)
1 onion, diced
3 carrots, diced
2 celery sticks, diced (optional)
8 oz mushrooms, thick sliced
2 cloves garlic, minced
2 t paprika
1-2 t Italian Seasoning
1-2 bay leaves
2 c beef stock
2 T cornstarch
1 T water
salt & pepper
6-8 biscuits (store-bought or home made dough)

Brown beef in a pan on all sides, then dump into a pot.  In the same pan, fry the onions, garlic, carrots and celery until fragrant.  Dump into the pot.  Add in paprika, Italian Seasoning, bay leaves, beef stock, salt & pepper.  Stir and bring to a boil.  Reduce heat to a simmer and cover.  Simmer for 1-2 hours, until meat is very tender.  Add in mushrooms, cook for 3-5 mins.  Combine cornstarch and water, then add to pot.  Cook and stir until thickened.  Pour filling into a baking dish (about 2 qt size).  Top with biscuits (philo dough or mashed potatoes could work too, but the biscuits are better).  Bake at 350 for 30-45 minutes.  Make sure whatever is on top is cooked through.  Serve warm.