Tuna spaghetti is one of the easiest pastas to make at home. The sauce comes together in the time that the pasta takes to cook, plus the canned tuna and the lemon work so well together! Canned tuna in olive oil is recommended for this recipe. Canned tuna in water works, but the final dish won't be as flavorful. Ready in just 20 minutes!
Bring a pot of water to a boil, add salt, and drop the spaghetti in. Cook until al dente (about 2 minutes before it's done cooking, remove it from the pot and place it into the sauce - it will finish cooking in the sauce)
While the pasta is cooking, heat olive oil in a pan. Add the onion along with the chili pepper and parsley stems, and sauté until onion is tender, about 5 minutes.
Add the tuna along with the olive oil from the can, and cook it down until it's warmed through, about 3 minutes.
Add the lemon juice and lemon zest. Add pasta to the pan and toss. Add pasta water. Add fresh parsley and toss until coated in the tuna sauce, about 2 minutes.
Plate, and top with additional parsley. Enjoy your tuna pasta!