Actually just dug out the list i was given (i dont use it really as I cook from the cookbook for variety) Avacado isnt on the list of vegetables.
200-300g of white fish is ok.
Food choices on Lite
150-225g Lean red meat or mince (including beef, lamb, venison)
150-250g Lean Pork
200-300g Lean white meat
200-300g White fish, include prawns
150-200g Oily fish (tuna, mackerel, sardines)
200-250g Quorn
200-250g Low fat cottage cheese
150-200g Paneer or curd cheese (quark)
100-200g cooked lentils
2 eggs medium/large
Vegetables
Artichoke, asparagus, aubergine, broccoli, brussels, cabbage, carrot, cauliflower,celery,chicory, courgette, cress, cucumber, endive, fennel, gherkin, green beans, kale, leek, mangetout, marrow, mushroom, okra, oinion, pak-choi, peppers, radish, salad leaves, spinach, spring greens, spring onions, swede, swiss chard, tamato, turnip, watercress
Fats and oils
2-3 tsp spread, veg,soya, or olive varieties
2-3tsp Oil, olive, corn,sunflower, rapseed or veg
2 tsp reduced fat mayo
3 tsp reduced calorie dressing
3 tsp single cream, soured crem and creme fresh
Dairy choice
250-300ml skimmed milk
200-250ml semi skimmed, soya milk
1 small pot (150g) low fat unsweetened, plain yoghurt
50-75g low fat soft cheese
25-30g reduced hard cheese
Hope this helps. xx