Wash and dry the fresh vegetables.

Core the tomatoes and remove the watery seeds. Dice the tomatoes and place in a large bowl.

Finely dice the onion and add to the bowl of tomatoes.

Remove the ribs and seeds from the jalapeño (if desired) and then mince the jalapeño. 

Combine the tomatoes, onions, and jalapeños in a large bowl and stir gently to combine. 

Add the juice of one lime and sprinkle the mixture with kosher salt.

Stir once again and allow to sit for 15-20 minutes for flavors to blend. Serve immediately!