Place steak in quart-sized freezer bag; combine lime juice, white wine vinegar, salad oil, oregano, and crushed garlic cloves; add to meat.
Freeze. To bundle: Steak/marinade mixture; flour tortillas; frozen vegetables.
To prepare: Thaw steak in marinade. Remove steak and pan-sear in hot pan. Cook until medium rare; remove from pan. In the same pan, add frozen vegetables and marinade; cover and cook until vegetables are crisp-tender.
While vegetables are cooking, slice meat into thin slices against the grain. Add to cooked vegetables. Add salsa to meat and vegetables; heat through.
To serve, spoon into warmed flour tortilla; garnish with avocado cubes, chopped tomato or fresh cilantro.