Since Tex Mex spaghetti is so incredibly rich and filling, I recommend keeping any pairings light and simple.  I like to include veggies and/or salad of some sort. A classic garden salad with your favorite toppings or my Thunderbird Salad would be great starters for your meal.  For sides, I recommend a fresh, crunchy recipe like this Spicy Cilantro Lime Slaw or some Easy Roasted Vegetables for even more veggie goodness.