Cut beef cubed steaks lengthwise into 1-inch strips and then crosswise into 1-inch pieces. Sprinkle chili powder over beef.
In large skillet or Dutch oven, heat oil over medium-high heat until hot. Add beef and onions and stir-fry 2 to 3 minutes or until outside surface of beef is no longer pink. Season with salt.
Stir in tomatoes and corn. Bring to a boil; reduce heat to low. Simmer, uncovered, 20 minutes.
Skillet/Pan-Frying Tip: Season beef (directly from the refrigerator), as desired, before placing in a preheated skillet (do not overcrowd). Do not add oil or water; do not cover.