Accras Saltfish Fritters

Name: Accras (Saltfish Fritters)
Ingredients: 1 large egg yolk; 1 garlic clove, finely grated; 1/2 teaspoon lemon zest plus 1 tablespoon fresh lemon juice; 3/4 teaspoon Dijon mustard; 1/8 teaspoon kosher salt, plus more to taste; 1/2 cup extra-virgin olive oil; 1/4 cup canola oil; 2 teaspoons minced preserved lemon; 1/2 pound boneless saltfish (such as dry salted cod), soaked overnight; 1 cup all-purpose flour (about 4 1/4 ounces); 2 teaspoons baking powder; 2 teaspoons curry powder; 1 teaspoon cayenne pepper; 1 teaspoon paprika; 1 teaspoon kosher salt, plus more to taste; 2/3 cup finely chopped scallions (about 5 scallions); 1 small red bell pepper, finely chopped; 3/4 cup water, plus more as needed; Canola oil, for frying; Lemon wedges; Hot sauce, for serving (optional)