Chipotle Shrimp Tostadas

Name: Chipotle Shrimp Tostadas
Ingredients: 10 oz. (315 g) large shrimp, peeled and deveined with tails intact, patted dry; 1/4 cup (2 oz./60 g) adobo sauce from a can of chipotle peppers, plus more for serving; 1 lime, plus 2 wedges and the zest of 1/2 a lime; 1 cup (8 fl. oz./250 ml) neutral oil; 2 6-inch corn tortillas; 1 cup (3 oz./90 g) shredded green cabbage; Kosher salt and freshly ground pepper, to taste; 1/4 cup (2 oz./60 g) crème fraîche (optional); Cotija cheese, for serving (optional); Sliced avocado, for serving (optional); Chopped cilantro, for serving (optional)