Place the drained cans of Del Monte green beans in a saucepan, and heat til hot.
Meanwhile, melt the margarine or butter in a skillet. Add the minced garlic & bread crumbs. Cook until browned & toasted, stirring occasionally. Stir in the lemon zest & remove from the heat.
Mix 2-3 tablespoons of the crispy crumbs in the green beans. Place the green beans in a serving dish, and top with the remaining panko crumb mixture.