Preheat oven to 350 degrees F.
Heat olive oil in a skillet.
Add onions, cook until soft.
Add bell peppers and cook well.
Add sliced steak, cook until browned.
In a bowl, beat eggs and cream.
Add Worcestershire sauce, salt, pepper, garlic powder.
Place steak mix in baking dish.
Pour egg mixture over steak mix.
Top with provolone and mozzarella cheese.
Cover with foil and bake 20 minutes.
Remove foil, bake 10 minutes more.
Let cool for 10 minutes before slicing.
Serve warm and enjoy the casserole.