Cook the pasta according to pack instructions, then drain.
Meanwhile, add the oil to a pan and fry the tomatoes for 1-2 minutes, then stir in the remaining ingredients and pasta, heating until the rocket has wilted. Serve immediately.
Serve with freshly grated hard cheese (e.g. Parmesan) sprinkled on the top, or try using different shapes of pasta (e.g. spaghetti), or replace the tuna with canned salmon.