Get a small Teflon coated frying pan and add the olive oil. Heat the oil over medium high heat and add the red onion. Cook the onion until sweet and tender (approx 5 minutes) stirring occasionally. Meanwhile, spread the margarine on the rye vegan bread, just enough to coat lightly. Cook your burger in the microwave for 1 minute. When the onion is finishe'd cooking, Make a sandwich out of all the ingredients with the buttered slices of vegan bread facing the outside. Grill the sandwich in the fry pan on both sides until they are golden toasty brown and the cheese is melted. Enjoy!!!