ERNESTO'S MEXICAN SHRIMP COCKTAIL

Ernesto brought this to work one day and I had to have the recipe.Ingredients:Ingredients:1 lb cooked cold shrimp, peeled and chopped4 Roma tomatoes, chopped1 large cucumber, peeled and chopped1 small onion, finely choppedJuice of 2 lemons (I've used bottled lemon and is still awesome)1 bunch cilantro, chopped3 avocados, peeled and choppedSalt and pepper to tasteDirections:Directions:Mix all together. Refrigerate for an hour. Serve with tostadas.