Cut the avocados in half lengthwise. Remove the pit from the avocado and discard. Remove the avocado from the skin, and place the avocado flesh on a cutting board. Cut the avocado in [1/2]-inch cubes and transfer the avocado to a medium sized bowl.

Add the jalapeño pepper, fresh lime juice and crumbled queso fresco to the bowl. Mash everything together with a fork until half chunky and half creamy. Season with salt and pepper to taste and serve immediately.