1Cut bell pepper in half; remove seeds. Place halves, skin sides up, on foil-lined broiler pan. Broil 3 to 4 inches from heat about 5 minutes or until skin blackens. Place in plastic bag; let stand 10 minutes to steam. Peel skin from pepper.
2Meanwhile, line microwavable plate with microwavable paper towels. Spread diced pepperoni on plate; cover loosely with microwavable paper towel. Microwave on High 2 minutes to remove excess fat.
3Cut roasted pepper into thin bite-size pieces.
4In small bowl, beat oil, vinegar and garlic salt with wire whisk until well blended. In large bowl, toss lettuce, roasted pepper, pepperoni, tomatoes and chickpeas with oil-and-vinegar dressing.