Mash the avocado with a fork and season with salt, pepper and lime juice.
Form 2 small burgers from the sensational burger. Halve the burger buns lengthways and toast the bottoms. Bake the burgers according to the instructions on the packaging.
Spread the avocado on the bread bottoms, spread some spinach and thinly sliced red cabbage on top and place the burgers on top. Stick a skewer with a cherry tomato through it. Serve with tarragon mayonnaise.