Heat the 1tsp oil in a small nonstick frying pan and stir-fry the proscuitto for a few minutes, until really crisp. Remove and drain on kitchen towel.
In a small bowl, mix together the garlic, 2tbsp olive oil, lemon juice, parsley and 1 tbsp of the chives, then season with salt and pepper. Put the chopped avocados and tomato into a serving bowl, pour the herbed oil mixture over and gently toss everything together.
Crumble the cooled proscuitto or Parma ham into smaller pieces and scatter over the avocados and tomato with the rest of the chives and a grinding of pepper.
Goes with tacos, or as an accompaniment to barbecued, roast or cold chicken.
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