Chestnut and Mushroom burgers

2 garlic cloves
1 large onion
butter
200g mushrooms
200g cooked/peeled whole chestnuts (available in Waitrose, Porter Foods Organic whole chestnuts)
fresh thyme
salt and pepper

• Melt the butter and add onion and cook until lightly brown
• Add garlic and thyme and simmer for 5mins
• Chop the mushrooms and half of the chestnuts  - safe the other half

• Add to the pan, simmer till the mushrooms are cooked, season to taste
• Place half of the mixture from pan into a bowl
• Spoon the remaining into a food processor and add the rest of the chestnuts and one egg
• Mix to make a stiff paste (can have small bits in it)
• Combine both of the mixtures and with washed wet hands shape into approx 10 flat burgers
• Grill on medium heat for 10minutes 

Served with veggie mash, boiled mini carrots and rocket