Emma Galloway's Tempeh & Mushroom Burgers with Smashed Avocado for 4 people By: Emma Galloway These burgers are a great plan-ahead meal because the patties keep well in the fridge for a couple of days – and I encourage you to chill them for at least 30 minutes because this helps to keep them together better when cooked. They also freeze really well. The world of gluten-free buns has come a long way since I started eating gluten-free, so I tend to buy them these days, although there was once a time when the only way I could eat nice junk-free gluten-free buns was to make them myself (you'll find the recipe in my second cookbook,