Discard any leftover marinade. Makes 4 servings. Cover and chill. Combine oil and lime juice. On an oiled grill, grill the snapper approximately 4-8 minutes on each side, basting with the lime juice mixture.
Fish is done when it flakes easily when tested with a fork.
Spread over fillets. Roll and secure with toothpicks. Place seam side down in a 2-quart casserole. In a medium saucepan, melt the remaining margarine. Stir in flour and cook over medium heat until bubbly.