Steam squid bodies and tentacles until tender, about 3 minutes. Transfer to plate and cool to lukewarm.
Cut squid bodies into 1/2-inch-wide rings. Cut squid tentacles in half if large. Transfer squid to large bowl. Add baby arugula, cherry tomatoes, beans, olive oil, and 2 tablespoons lemon juice. Toss gently to blend, adding more lemon juice, if desired. Season with salt and pepper.
What to drink: Citrusy A Mano 2007 Soave ($9)
Per serving: 339.7 kcal calories, 55.7 % calories from fat, 21.0 g fat, 3.1 g saturated fat, 264.2 mg cholesterol, 15.8 g carbohydrates, 3.4 g dietary fiber, 2.6 g total sugars, 12.4 g net carbohydrates 21.6 g protein Nutritional analysis provided by Bon Appétit