1. Preheat broiler to high.
2. Halve bell pepper lengthwise; discard seeds and membranes. Place halves, skin sides up, on a baking sheet. Broil 12 minutes or until blackened. Seal in a paper bag. Let stand 5 minutes. Peel; chop. Combine bell pepper and next 6 ingredients (through beans). Combine rind, juice, garlic, oil, 1/8 teaspoon salt, and 1/8 teaspoon pepper.
3. Heat a large skillet over medium-high heat. Coat pan with cooking spray. Sprinkle shrimp with remaining salt and pepper. Cook 2 minutes on each side or until done. Add shrimp, lemon mixture, and nuts to arugula mixture; toss.