In a medium saucepan, mix one can (10 and three-fourths ounce), of condensed cream of mushroom soup and one-half cup sour cream or plain yogurt.

Gently stir in 1 cup freshly sliced or canned mushrooms. Add family meal-size portion of freezer meatballs, two to four per person depending on age or person and size of meatball.

Simmer on medium low until meatballs are heated. Meanwhile, cook egg noodles according to package directions.

Drain noodles when cooked and serve meatball mixture atop the noodles.