Tex Mex Dip
["2 (10 1/2 oz.) cans bean dip", "3 large ripe avocados", "2 Tbsp. lemon juice", "1/4 tsp. salt", "1/4 tsp. pepper", "1 c. sour cream", "1/2 c. mayonnaise", "1 (1 1/4 oz.) pkg. taco seasoning", "3 to 4 chopped, peeled tomatoes", "1 bunch chopped green onions (include tops)", "2 cans pitted black olives, sliced", "1/2 lb. shredded Cheddar cheese"]
["Layer on largest platter possible:"]
["bean dip", "avocados", "lemon juice", "salt", "pepper", "sour cream", "mayonnaise", "taco seasoning", "tomatoes", "green onions", "black olives", "Cheddar cheese"]