To prepare vinaigrette, drop garlic through food chute with food processor on; process until minced. Add broth and next 7 ingredients (through black pepper); process until well blended.
To prepare salad, combine 2 tablespoons vinaigrette and shrimp in a large zip-top plastic bag; seal. Marinate in refrigerator for 20 minutes, turning bag occasionally to coat shrimp.
Place potatoes in a large saucepan; cover with water. Bring to a boil; cook 8 minutes. Add haricots verts to pan; cook 2 additional minutes or until haricots verts are crisp-tender and potatoes are tender. Drain and rinse with cold water; drain. Cut potatoes into 1/4-inch-thick slices. Set aside.
Heat a large grill pan over medium-high heat. Coat pan with cooking spray. Remove the shrimp from bag, and discard marinade. Add shrimp to pan. Cook 3 minutes on each side or until the shrimp are done.
Combine potatoes, haricots verts, greens, lettuce, bell pepper, tomatoes, and artichokes in a large bowl. Add remaining vinaigrette, tossing gently to coat. Place lettuce mixture on a serving platter. Arrange shrimp and eggs over lettuce mixture; sprinkle with olives and capers. Serve immediately.