HEAT 1-1/2 tsp. oil in large nonstick skillet on medium-high heat. Sprinkle meat with pepper. Add half the meat to skillet; cook and stir 1 to 2 min. or until evenly browned. Transfer to bowl. Repeat with remaining oil and meat.
COOK noodles as directed on package, omitting salt. Meanwhile, heat Italian dressing in same skillet on medium heat. Add next 4 ingredients; cook 12 min. or until vegetables are crisp-tender, stirring occasionally. Stir in broth and peas; simmer 2 min. or just until peas are tender. Add meat; cook 1 to 2 min. or until heated through, stirring occasionally. Stir in sour cream until well blended.
DRAIN noodles. Serve topped with meat mixture and tomatoes.