Drain salmon if using canned. Place drained salmon in a bowl and mash with a fork so there are no lumps. To salmon, add all other ingredients. Mix well and divide into 4. Form 4 balls and press them in the palm of your hand gently to form patties. Heat up a skillet and pour a few tablespoons vegetable oil just to coat bottom of pan. When oil is hot, gently place patties in pan. Cook until golden brown on both sides, about 2 to 3 minutes on each side. Remove from pan and serve with tartar sauce and lemon wedge if you wish.