Mushroom Gratin

about 1 lb of  leftover  slowcooker mushrooms (many versions online, I used the one at Plain Chicken but subbed 1/2 cup reg  bottled Italian dressing instead of powdered) 1 cup cottage cheese 1 cup  shredded mozzarella cheese Preheat oven to 350. Chop mushrooms very fine in food processor. Mix in cottage cheese and cheese, reserving…