Combine the tomatoes, onion, cilantro, jalapeno, lime juice, and avocado in a medium-size mixing bowl. Use a potato masher or a fork to smash the avocado, feel free to leave a few smaller chunks in the mix.
Sprinkle with 1/4 teaspoon each of salt and pepper. Stir to combine. Taste and add additional salt and pepper to taste. Add the pomegranate seeds.
Serve with tortilla chips or crackers. Store the guacamole in an airtight container in the refrigerator for up to 2 days. Enjoy!
Notes
To make juicing the key limes easier, microwave the key limes for about 20 seconds before cutting them open. If key limes are not available, half lemon juice and half regular lime juice can be substituted for the key lime juice.