Preheat the olive oil in the pan over medium heat for a few minutes.
Squeeze out the sausage into the pan and break it down with a potato masher or a spatula.
Cook until cooked through. That means, until you can no longer see pink-red colors inside. This should take about 10 minutes. To check, you can break down the biggest chunk.
While the sausage cooks, make the guacamole. Mix everything in a bowl leaving avocado somewhat chunky. You can adjust the amounts of ingredients to your liking.
When the sausage is cooked, transfer it to a paper lined plate to absorb extra grease.
Place 3 lettuce leaves on each plate. Distribute the cooked sausage evenly among them and top with guacamole.
Sprinkle with taco seasoning and serve with lime halves on the side!