Semi-Homemade Ravioli

I can't believe I've never made Ravioli before! They're so easy (thanks to the good old freezer aisle!) and SO yummy! Of course if I wanted to be really gourmet, I could totally make my own with Wonton skins but this was quick and great on a weeknight! (The left-overs are awesome, by the way!)
Ingredients: (4 servings)

1 lb lean ground beef
3 c Marinara sauce
1 c mushrooms, sliced
1 pkg (9 oz each) refrigerated cheese-filled ravioli
2 Tbsp shredded Parmesan cheese
1 Tbsp chopped Italian seasoning

Preparations:

1. Cook beef in large skillet over medium-high heat 7 minutes, or until browned and crumbled, stirring frequently; drain. Stir in spaghetti sauce and mushrooms; blend well. Bring to boil.
2. Meanwhile, cook ravioli in a pot of boiling water according to directions.
3. Add the cooked ravioli to skillet; spoon meat sauce over ravioli until well coated. Reduce heat; cover and simmer on medium for about 2 minutes.
4. Sprinkle with cheese and seasoning.