Place all the burger ingredients except the oats, sweetcorn and butterbeans in a food processor and mix until you have a thick paste. Add the rest of the ingredients and pulse briefly to ensure you keep some texture. Season
Divide mixture into 4 and shape with you hands into burger shape.
Place burgers in oiled ovenproof dish. Splash some olive oil over the top of the burgers and then place in oven 0n 180C. After 5-7 mins turn the burgers and place back in the oven for another 5-7 mins. Remove from the oven.
Place all ingredients into a blender and blend until smooth.
Serve the burgers topped with the dressing and a side salad.