Warm Shrimp Salad

Name: Warm Shrimp Salad
Ingredients: Three ¾-inch-thick slices country bread; 1 large garlic clove, halved lengthwise; 12 jumbo (11/15 count per pound) shrimp or prawns, shelled and deveined; 1 teaspoon kosher salt, divided, plus more to taste; ½ teaspoon freshly ground black pepper, divided, plus more to taste; ½ cup plus 1 tablespoon extra-virgin olive oil, divided; 1½ tablespoons fresh lemon juice; One 15-ounce can cannellini beans; 2 medium shallots, finely chopped; 2 green thai chiles, thinly sliced; 3 cups arugula