Fill a deep fryer with vegetable oil and preheat to 375° F. Line a large plate with paper towels. In a mixing bowl, whisk together flour, curry powder, baking powder, and salt. Whisk in water slowly to avoid lumps.Stir in smoked salmon, red and yellow peppers, jalapeños, and scallions. Cover and let rest in the refrigerator for 20 minutes. Using two spoons, form quenelles (small football shapes), and carefully place into the hot oil. Cook until golden brown, approximately 2 to 3 minutes. While they are frying, make sure you “make them swim” by carefully moving them around with a slotted spoon or a kitchen spider. Transfer to the lined plate to drain well. Pat dry with paper towels.