Ingredients
6 tablespoons vegetable oil
1 teaspoon grated lime zest and 2 tablespoons fresh juice
4 teaspoons chipotle-in-adobo sauce
1 pound portobello mushrooms (3 to 4), cut into 1/2-inch planks
Kosher salt and freshly ground pepper
1 cup finely chopped white onion (1/2 large)
1/2 cup sour cream
2 ears corn, shucked
8 corn tortillas
Cilantro sprigs, for serving
Preparation
Heat grill to medium-high. In a small bowl, whisk together 5 tablespoons oil, 1 tablespoon lime juice, and 2 teaspoons chipotle sauce; brush mixture onto both sides of mushrooms. Season generously with salt. In a large bowl, stir together lime zest, remaining 1 tablespoon lime juice, and onion; season with salt and pepper. In another small bowl, combine remaining 2 teaspoons chipotle sauce, sour cream, and 1 tablespoon water; season with salt.
Grill mushrooms, flipping once, until charred in places, 3 to 4 minutes a side; transfer to a plate. Grill corn, turning occasionally, until charred, 6 minutes. Cut kernels off cobs; stir into onion mixture with remaining 1 tablespoon oil. Season with salt and pepper. Grill tortillas, flipping once, 30 seconds. Top tortillas with sourcream mixture, mushrooms, corn salsa, and cilantro; serve.