Rub steaks with oil, steak seasoning, and salt.
Cook steaks, in batches, in a grill pan over medium-high heat 5 to 7 minutes on each side or to desired degree of doneness. Let stand 10 minutes. Cut diagonally across the grain into thin strips.
Note: We tested with McCormick Grill Mates Montreal Steak Seasoning.
For an easy side, prepare couscous according to package directions. Stir in fresh spinach leaves, lemon zest, and cherry tomato halves; toss until combined.