Wash the meat, dab dry and cut into small pieces. Peel and halve onions and cut them into rings. Drain the corn. Clean, wash and cut the peppers into pieces.
Heat the oil in a pan and fry the meat for about 8 minutes, turning it over. In the meantime, peel the garlic and press it through a garlic press. Peel and halve the avocado and remove the stone.
Dice the pulp and puree it with a blender. Stir the garlic, lime juice, yoghurt into the avocado puree and season to taste with salt, pepper, cayenne pepper and sugar. Papr
Bake the taco shells in a preheated oven (electric oven: 200 °C / gas: level 3) for 2-3 minutes. Wash the salad, drain and pluck into bite-sized pieces. Put the lettuce and chicken pan into the warm tacos and serve with the avocado dip.