Enchiladas Rib Eye With Aguachile
Ingredients:
1/2 red onion, thinly sliced (about 1 cup)
3 tablespoons, plus 1 tsp. olive oil, divided
2 tablespoons red wine vinegar
2 3/4 teaspoons kosher salt, divided
1 teaspoon freshly ground pepper, divided
1 (1-pound)…