Ingredients for tuna pasta on the left: cooked on the rightI’ll be honest: normally, I hate the idea of tuna with pasta. But when Nigella Lawson (who admits she used to dislike the canned stuff too) said her “instant pasta sauce” converted her, I listened up. After all, I’ve already tried (and loved) her “old-fashioned” chocolate cake, perfect scones, and tiramisu. Nigella claims the delicious concoction was so good, it “is a regular fixture in my eating diary.”And as someone whose existing midweek meal rotation was beginning to feel a little tired, I figured I’d put her claim ― that it’ll