I made a yummy onion/leek/mushroom sauté thing to serve with steak tonight. It made way more than we'll eat. Can I freeze it for a dinner I'm having next week (thinking it would make a good snack on some crostini with goat cheese) or will it last in the fridge a week? I sautéed onions, leeks, and creminis until they were all soft and melty if the method matters. Thanks!