Hot Penne with Chilled Tomato Sauce and Charred Tuna

Interesting, but ...

• Hot pasta, cold tomato sauce --> lukewarm everything. The sauce is very tasty, but think it would be better to warm it a bit.
• There's an error (i.e., missing words) in my book; the sauce is prepared and then nothing happens to it. Found the recipe online and the second sentence of step 4 should be: Divide the pasta >>and sauce<< among 4 shallow bowls.
• The cooking time given (3min per side) does not give tuna steaks that are rare inside. Mine were almost 1" thick, but they were just barely pink inside. I will try 2min per side next time.
• I made a half recipe for two. It's lots of food. Tasty, but lots.
• I'd consider using this sauce on its own over tagliatelle (or any pasta) as a vegetarian dinner.