Turn on countertop grill on a medium-high setting

Use a cutting board to slice onion into very thin circles

In a small skillet heat up olive oil and saute onion circles for 2-4 minutes on low-medium heat, add salt and pepper to taste and set aside

Form two 4 Oz burger patties and place on grill and cook between 3-5 minutes on each side depending on if you like it well done or medium rare

Remove from grill and place each burger on top of strips of lettuce and a slice of tomato

Place 2 oz of pastrami on the countertop grill in strips for about 1-2 minutes on medium-high heat

Remove from grill and place some onion circles on top of burger and end with warm pastrami

Season with salt and pepper to taste