Natasha threw this together for a girls’ lunch. Luckily, I got to watch the process. I recreated it for dinner.
2 T olive oil
2 small white onions, finely diced
3 cloves garlic, crushed
3 cans diced tomatoes with basil
⅓ c milk
2 cans albacore tuna in water, drained and flaked
1 can each sliced green and black olives, drained and rinsed
1 small jar capers, rinsed
1 small can tomato paste
Sauté onion and garlic in olive oil over medium heat until onions are translucent and tender. Add the tomatoes and tomato paste and stir until paste is well integrated. Add all the rest of the ingredients. Stir and simmer over low heat for 20-30 minutes. Serve over hot pasta with grated Grana Padano.