Bring a large pot of salted water to a boil.
Meanwhile, put the spinach, chopped shallots, garlic, drained tuna, grape tomatoes, olives, pine nuts and red pepper flakes in a really large bowl. Season with salt and pepper.
Cook the pasta according to package directions.
While the pasta cooks, whisk together the Dijon mustard, lemon juice, red wine vinegar, honey, chopped dill, extra virgin olive oil and a pinch of salt and pepper.
Drain the pasta, then immediately add it to the bowl with the rest of the ingredients. Pour the Dijon dill sauce over the pasta, and toss well. Season with salt and pepper to taste. Feel free to add a splash more oil and vinegar if you desire. Serve immediately.