I found this recipe by simply doing a google search and coming across one on Allrecipes. It takes like ten minutes to make and 2 minutes to devour. I'm sure there are neat variations, so I plan to look in the comments at a later time for ideas.
1/4 C chopped cilantro (less for Eric)
1/2 lime, juiced
salt and pepper, to taste
2 avocados, diced
onion, chopped... eyeball it, to taste
optional chopped green pepper
1 large, ripe tomato
Combine all ingredients except salt and pepper, tossing lightly until evenly coated. Season with salt and pepper. Toss again.