So what I did, I cooked the pasta first according to package then drain when cooked and set aside.
I grab some garlic and crushed it. Some onions and chopped it. Put some olive oil in the pan. Put in the garlic and onions. Let it brown a bit. Then add the drained tuna. Then sprinkle some salt and pepper and add some oregano. After a few seconds set it aside.
And then, I grab another garlic and crushed it again, I fry it in some olive oil. Brown it and then, I mix the drained penne pasta. Put some thyme leaves and add some pepper. Then mix well in low fire. Add in the tuna mixture. Then drizzle some olive oil and grated cheese. Then that's it. It's done. Very easy and very yummy.
You can add any herbs that you can find in your kitchen. Served it with garlic bread. Yummy