Place a nonstick skillet coated with cooking spray over medium-high heat until hot. Add zucchini and onions; sauté 3 minutes or until tender. Stir in rice and the next 4 ingredients (rice through black pepper); cook 1 minute, stirring constantly. Remove from heat; stir in sour cream.
Warm tortillas according to package directions. Spoon half of rice mixture down center of each tortilla. Top each with half of lettuce and tomato; roll up. Serve with salsa.