Combine orange juice, 2 tablespoons oil, vinegar, honey, orange peel and mustard in large bowl. Cut pork into 1/4-inch slices. Cut each slice into julienne strips. Add pork to marinade; stir to coat. Marinate in refrigerator 4 hours or overnight. Drain pork, reserving marinade. Transfer marinade to small saucepan; heat to boiling. Boil 1 minute; remove from heat. Heat remaining 1 tablespoon oil in large skillet over medium-high heat until hot. Cook pork, stirring, until no longer pink, about 5 to 7 minutes. Drain liquid. Remove from heat; cool.
Combine pork, rice, strawberries and grapes in large bowl. Pour marinade over salad; toss well. Serve immediately on lettuce leaves.