Cut the avocados in half, remove the pit, and scoop the flesh into a mixing bowl.

Use a fork to mash the avocados to your desired consistency (smooth or chunky).

Add the diced tomato, chopped onion, minced garlic, minced jalapeño, lime juice, salt, and cilantro (if using) to the mashed avocados.

Stir all ingredients together until well combined. Adjust seasoning if necessary and serve immediately.