Place the bread crumbs in a bowl. In a shallow dish, mix the dressing mix and oil to form a paste. Coat the tilapia fillets with the paste, then dredge in the bread crumbs to lightly coat.
Melt the butter in a skillet over medium heat. Place the fillets in the skillet, and cook 5 minutes on each side, or until golden brown and easily flaked with a fork.
