Add lobsters & salt to boiling water in large stockpot; cover & simmer 20 minutes. Remove lobster & set aside. Cook clams, mussels & shrimp in same liquid, cooking shrimp 2-5 minutes & clams & mussels until open. Lift out & chill shellfish. Strain broth, reserving 2 1/2 cups; combine reserved broth, saffron, pepper, garlic, butter & sherry in saucepan. Bring to boil. Add rice; cook, covered, over low heat 15 minutes or until tender & liquid is absorbed. Shell shrimp & lobsters, reserving 2 lobster claws for garnish; cut lobster meat into pieces. Combine rice & shellfish in large serving bowl; mix lightly & chill. Halve avocados lengthwise, twisting gently to separate halves; whack a sharp knife directly into seeds & twist to lift out. Peel avocado halves; place cavity side down & slice. Brush with lemon juice. Arrange avocado slices on seafood rice mixture in serving dish; garnish with lobster claws. Serve with olive oil, salad dressing or Tartar Sauce. Serve with sour dough bread to sop up gravy. File ftp://ftp.idiscover.co.uk/pub/food/mealmaster/recipes/mmkah001.zip