Preheat oven to 350°. Bake pecans in a single layer in a shallow pan 5 to 7 minutes or until lightly toasted and fragrant, stirring halfway through.
Preheat grill to 350° to 400° (medium-high) heat. Devein shrimp, if desired, and toss with olive oil. Grill shrimp, covered with grill lid, 2 to 3 minutes on each side or just until shrimp turn pink. Grill peach wedges 1 to 2 minutes on each side or until grill marks appear.
Toss salad greens with Sweet Tea Vinaigrette; season with salt and pepper to taste, and top with grilled shrimp, peaches, blue cheese, and pecans. Serve immediately.