Tortellini Primavera
["1 (16 oz.) pkg. tricolor cheese tortellini", "1 lb. asparagus, cut into 2-inch pieces", "2 large carrots, pared and thinly sliced", "1 large clove garlic, crushed", "1/2 tsp. salt", "1/3 c. freshly grated Parmesan cheese", "1/4 tsp. freshly ground pepper", "2 Tbsp. olive oil", "1/2 lb. mushrooms, sliced", "1/2 lb. snow peas, trimmed", "1 onion, sliced crosswise and separated into rings", "1 c. heavy cream", "1/4 c. butter or margarine"]
["Cook tortellini as package label directs; drain.", "Keep warm."]
["tricolor cheese tortellini", "carrots", "clove garlic", "salt", "Parmesan cheese", "freshly ground pepper", "olive oil", "mushrooms", "snow peas", "onion", "heavy cream", "butter"]