Beef Onions and Mushrooms in Cheater Yorkshire

I love the holidays.  Family, friends, food, drink and fun.  We tend to get a little lazier and hang out playing games, watching movies and just generally putzing about.  I like to experiment with new recipes as well.  Tis the season, why not?!
This recipe is something I came up with a few years ago by accident and has made over and over again.  We had a bag of frozen yorkshire, yes frozen, although never for a roast dinner when only the proper homemade yorkshire is very necessary.  (For last minute food emergencies).  We had a small piece of steak, some mushrooms and onions and blue cheese and weren't sure what to do .....I pondered only briefly.  That frozen yorkshire was going to be a vehicle for my beef.....it's going to drive it home!
Anyhow, you can totally do this vegetarian, which I've done many times before as well.  I usually serve this as an appetizer but have made a meal of it and served a salad or roasted asparagus alongside.  This will not disappoint. 
p.s. The reason I like the frozen yorkshire for this is because they keep their shape, have a wee crunch and take 4 whole minutes in the oven. 
p.p.s. You can prep a lot of this ahead of time and assemble and bake just before serving.




Beef Onions and Mushrooms in Cheater Yorkshire
(no quantities - make what you need)

1 bag of frozen Yorkshire (I use President's Choice frequently)
Top sirloin or beef tenderloin, cooked medium and sliced thinly
Blue Cheese, St Agur or a Stilton work nicely
Onion, sliced thinly
Mushrooms, sliced
Garlic, minced
Fresh Thyme
Salt and Pepper

Caramalize the onions over medium heat in butter/olive oil for about 30 minutes, or until sweet and golden brown, seasoning with a little salt and pepper.  Set aside and saute the mushrooms in the same pan, adding a little more butter or olive and tossing in the garlic halfway through.  Sprinkle some fresh Thyme leaves (1-2 tsp) and season with salt and pepper.  Cook another minute or so.  Remove from pan.  These steps can be done ahead of time.
Preheat the oven according to the package of yorkshire, usually 400F.  Place some thinly slice beef in the yorkshire.  Top with onions and mushrooms and a about 1-2 tsp of the the blue cheese, or more to taste.  Bake according to directions, or about 4 minutes.  Serve!