1. Grill sausages and set aside. Once cool, slice into bite size rounds.
2. Prepare pasta according to package directions, drain, rinse to cool, drain thoroughly and set aside.
3. Bring a large pot of salted water to boil and add the asparagus, cooking 6 - 8 minutes until almost tender. Immediately plunge the cooked asparagus into cold water. When cool, drain and set aside.
4. In a large bowl combine the pasta, asparagus, red onion and sun dried tomatoes and sausage.
5. In a separate bowl whisk together the mayonnaise, garlic, white wine vinegar, tarragon and water. Season with salt and pepper to taste.
6. Pour the garlic mayonnaise over the salad and toss.