Pre-heat oven to 180ºC. Line a baking tray with non-stick baking paper.
Chop the cold cooked vegetables into small pieces and place in a bowl. Add 1 tablespoon of dairy-free milk and the seasoning.
Mash together until everything starts to stick. Add more milk if needed.
Separate mix into 4. Using a burger mould or free hand, press out 4 separate patties on to the lined baking sheet.
Bake in the oven for 20 minutes then carefully turn over and bake for another 10 minutes until firm and brown. Serve immediately.