Calamari Salad

My son's current favorite food is Calamari Salad from Scotto's Italian in Hampton Bays, NY. This is my copy attempt:

2 lbs cleaned squid
3 thinly sliced celery stalks
1 yellow or orange pepper, cut in pieces
2 - 3 thinly sliced shallots
8 - 10 Calamata olives, pitted and diced
3 - 4 Campari tomatoes

Dressing
3 tbsp lemon juice
1 tbsp rice vinegar
1/2 cup olive oil
11/2 tsp Italian spice mix
2 garlic cloves, minced
1 tsp salt
1/4 tsp black pepper

1. Thinly slice squid and boil in lightly salted water until opaque, about one minute. Do not over boil. Toss squid with ice cubes to stop from further cooking.
2. Whisk dressing together and add sliced shallots. Let sit while you slice remaining ingredients.
3. Add remaining ingredients and save a few tomato wedges for decoration.
4. Cool for a couple of hours before serving, turning content upside down a couple of times to better distribute the flavors.