Taco spaghetti can be enjoyed on its own or paired with a variety of toppings and side dishes. Popular toppings include shredded lettuce, diced tomatoes, sliced black olives, diced onions, and a dollop of sour cream or guacamole. For side dishes, you could serve it with a fresh green salad, garlic bread, or a side of refried beans or Mexican-style rice.