Boil pasta on medium temperature for 10 mins. Season with a dash of salt if desired. Empty both cans of tuna into a large bowl. Add spinach, sweetcorn, broccoli and mushrooms. Mix well with garlic and herbs. Add drained pasta to bowl and mix again. Add contents of bowl into a level ovenproof dish. Add cheese and black pepper on top and bake for 15-20 mins in the oven on 200 degrees celcius. Remove from oven when golden color. Serve on plate and enjoy!