Mexican Mushroom and Spinach Sandwich Vegan Torta Recipe

Name: Mexican Mushroom and Spinach Sandwich (Vegan Torta) Recipe
Ingredients: 2 medium poblano peppers; 2 tablespoons olive oil, plus more if toasting; 10 ounces white button or cremini mushrooms, thinly sliced; Kosher salt and freshly ground black pepper; 2 medium cloves garlic, finely sliced; 8 ounces fresh spinach leaves; 1 cup homemade or store-bought vegetarian refried beans; 2 tablespoons finely chopped chipotle pepper in adobo sauce; 2 teaspoons dark molasses; 4 hearty sandwich or hero rolls; 3 whole pickled jalapeño peppers, stems and seeds removed, cut into strips; 3/4 cup pickled red onions; Handful fresh cilantro leaves; 1 avocado, sliced