Skirt Steak Asada Tacos

Name: Skirt Steak Asada Tacos
Ingredients: 2 tablespoons extra-virgin olive oil; 1 medium yellow onion, coarsely chopped; 2 medium poblano peppers, cored, seeded, and cut into thin strips; 4 cloves garlic, coarsely chopped; 1 tablespoon chili powder; 1 teaspoon ground cumin; 6 canned plum tomatoes, drained; 1 teaspoon salt, plus more for grilling; 2 pounds skirt steak; 1 medium red onion, finely chopped; 1 bunch cilantro to yield 1 cup, loosely packed; 1/4 cup freshly squeezed lime juice (2 to 3 limes); 8 soft corn tortillas; 3 limes, cut into wedges for serving