Adding tuna to pasta is something my mom would always do, perfect for a hot day. This pasta has fresh arugula, capers, tomatoes, chunky feta, sumac, and Tabasco, all brought together with an easy lemony vinaigrette that enhances all the flavors. If you're not into tuna, try it with flaky, canned salmon. For a vegan or vegetarian option, use mashed chickpeas and vegan mayonnaise with capers, lemon, and nutritional yeast for a 'vegan tuna'.