Ham Tortellini Alfredo

1pkg cheese tortellini
1/2 c. chopped onion
1/3 c. butter
1/2 c. frozen peas
1 c. fresh mushrooms, sliced
1c. cubed cooked ham
3/4 c. whipping cream
1/4 tsp. pepper
3 cloves garlic, minced
1 c. ricotta cheese
grated parmesan

Cook tortellini acc. to pkg. In skillet, saute onions in butter til tender. Add ham, peas, and mushrooms; cook til mushrooms are tender. Stir in cream, garlic, and pepper; heat through. Stir in ricotta cheese until melted. Drain tortellini and place in serving dish. Add the sauce and toss to coat. Sprinkle with parmesan.