1-1/4 lbs. top sirloin steak, cut 1-inch thick
1/3 cup bottled Italian dressing
3 tbs. fresh lime juice
2 green or red bell peppers, each cut into quarters
2 medium onions, cut crosswise into 1/2-inch slices
8 medium flour tortillas, warmed
-- prepared salsa
8 bamboo skewers
8 medium flour tortillas, warmed