Lightly salt water and bring to a boil. Add tortellini and cook until al dente, about 8 minutes. Drain and set aside.
Meanwhile, chop veggies, except avocado, and make dressing (recipe below).
Combine tortellini and veggies in a large bowl. Toss with about 1/2 the dressing. Cover and refrigerate overnight. Add 1/4 cup dressing and avocado immediately before serving. Reserve remaining dressing to use with leftover salad.
Lemon Herb Dressing
In a large mason jar combine olive oil, lemon juice, white wine vinegar and water. Add garlic, freshly chopped herbs and salt and pepper. Shake vigorously to mix well. Use immediately. Refrigerate leftovers and be sure to shake before each use.
Feel free to swap out veggies for your favorites or for what's available. I love adding fresh avocado or kalamatta olives to this salad. Black olives are great too!