1 large beet, cut into matchsticks
1 large carrot, cut into matchsticks
2 tablespoons finely chopped parsley, plus leaves for garnishing
2 tablespoons lemon juice, plus wedges for serving
3 tablespoons olive oil
Kosher salt and black pepper
1 tablespoon smoked paprika
4 6-ounce skinless flounder fillets
12 6-inch flour tortillas, warmed
Sour cream, for serving