Seafood Burgers W/basil Tartar Sauce Lhj

• 4 english muffins split
• 1 egg (white lightly beaten)
• 1 basil leaves for potato chips (fresh garnish)
• 210 gr cod fillet (boneless)
• 120 ml mayonnaise
• 28 gr italian-style dry bread crumbs
• 16 gr onion (finely chopped)
• 16 ml lemon juice (fresh)
• 10 ml vegetable oil
• 7 gr onion (finely chopped)