Place drained tuna, garlic, lemon zest, lemon juice, olive oil, olives, parsley, salt and pepper in a heatproof bowl. Let the bowl sit over the pot where you’re cooking the pasta. You may have to create a vent between the bowl and pot by placing a wooden spoon just under the lid.
After 8-9 minutes, drain pasta. Stir pasta into tuna mixture and toss well.
Top with fresh Parmesan cheese and serve.