1 pound calamari (bodies and tentacles), rinsed and dried
1 pound cockles or small clams, scrubbed
2 1/2 pound watermelon, cut into 1-inch cubes
3 scallions, thinly sliced
1/2 cup fresh cilantro, coarsely chopped, plus more for garnish
1/2 cup fresh mint, torn, plus more for garnish
1 red chile, thinly sliced
1/3 cup pickled red onion
Directions
Whisk all the ingredients together in a bowl until well combined.
Bring a large pot of water to a boil.
Prepare an ice water bath.
Using a kitchen mallet, pound the calamari a few times to tenderize. Insert a sharp knife into each calamari body, cut along the seam, and open up. Lightly score inner sides at ¼” intervals. Cut in half lengthways, to form 2 pieces. Slice into triangles, each about 4-inches tall by 1 ½-inches wide. If any of the tentacles are particularly large, slice them in half.
Blanch the calamari in boiling water for 30 seconds. Remove from the water with a slotted spoon, and transfer to the ice bath. Drain and pat dry. Place in a separate bowl.
Put cockles into saucepan, and cover with water by 1-inch. Cover and simmer until shells open, about 7 minutes. Drain. Discard any unopened shells.
Add cockles, watermelon, scallions, cilantro, mint, chile, pickled onion, and dressing to the calamari. Toss to combine. Garnish with extra mint.