We use this on a ton of stuff! Here it is over Salmon (simply baked with salt and pepper at 350 for 30 min).
2 ripe avocados, diced
1 mango, diced
1/4 cup chopped cilantro (you can leave this out if you're not a fan)
Chopped red onion (sometimes I leave it out)
Juice of 1 lime
S&P to taste.