Preheat the oven to 350 degrees F (175 degrees C).
Melt 2 tablespoons of shortening in a large skillet over medium-high
heat. Add the onion and ground beef to the pan, and cook until
onion is tender and beef is browned, stirring frequently and
crumbling beef. Drain fat.
Season with 1 teaspoon of salt and
pepper, then sprinkle 3 tablespoons of flour over the top. Pour in
the tomatoes and Worcestershire sauce, and stir to blend
everything. Cook for a few minutes, until slightly thickened. Stir in
the carrots and green beans, then transfer to a 2 quart casserole
dish
In a medium bowl, stir together 1 cup of flour, baking powder,
mustard powder and 1/2 teaspoon of salt. Cut in 2 tablespoons of
shortening until only small lumps remain, then stir in the cheese and
milk to make a thick batter. Spoon over the top of the casserole,
and spread evenly
Bake for 25 to 30 minutes in the preheated oven, until the top of the
puff is golden brown