Slice the veggies.

Heat up the oil in a skillet over medium heat.

Once the oil is hot add the onion and jalapeno.

Cook for 3 minutes. Season with salt and pepper.

Stir and add the minced garlic and cook for another minute.

Add the tomatoes. Reduce heat to medium low. Cook for 5 minutes or until the tomatoes have softened.

Add the drained tuna and stir. Cook for 5 more minutes.

Remove from heat and let cool before serving.