Grilled Roast Beef and Cheese with Cola Caramelized Onions

Assemble sandwich by layering the roast beef, cheese and caramelized onions on a slice of buttered bread (buttered side down), then top with another slice of buttered bread (butter side up). Grill on medium-high heat for approximately 3 minutes per side.

For the caramelized onions: Add the olive oil and butter to a medium-sized skillet over medium heat. Add the onions. Once the onions begin to soften and char on the edges add the white vinegar, worcestershire sauce and brown sugar and cook until liquid evaporates. Next add the initial 1/3 cup of cola and cook until cola evaporates; then add the water and cook until the liquid evaporates; and finally finish with the remaining 1/3 cup of cola and cook until all the liquid evaporates.