Place the garlic, walnuts, watercress, Parmesan cheese, and mayonnaise into a food processor or blender. Pulse until a finely chopped paste has formed.
Burgers
Combine all the ingredients and form into patties.
The burger is quite soft and lends itself best to pan frying.
Lightly spray your pan with oil, High then medium heat.
3 minutes each side leaves the burger medium rare. 5 Minutes recommended.