For Meatballs
Add ground beef, egg, steak sauce, cracker crumbs, Mrs. Dash, garlic, salt and pepper into a bowl.
Gently mix together until well combined. Form into 1 1/2 inch balls.
Bake on a greased baking sheet at 375 degrees for 20 minutes or add the oil to a skillet over medium heat. Cook until brown on all sides, about 10 minutes.
Remove to a paper towel lined plate to drain. Set aside.
For Creamy Mushroom Gravy
Add 2 tablespoons of butter to a medium to large skillet and place over medium heat. Add mushrooms and cook, stirring often about 5 minutes.
Mix broth and cornstarch together and add to mushrooms. Add herbs de provence, salt and pepper. Cook until it comes to a boil.
Lower heat to simmer and cook 5 minutes. Stir in mascarpone and stir until smooth. Cook 5 minutes.
Add meatballs to gravy and simmer for 10 minutes or serve the gravy on the side.