1. In a large saucepan, add red and white onions, honey, mustard, and vinegar. 2. Over medium heat, stir and saute, until onions are crisp-tender, about 6 to 8 minutes. 3. Butter 1 side of each slice of bread; top unbuttered side of each bread slice with 1/4 of the roast beef, 1 slice of cheese and 1/4 of the onion mixture. 4. Top with remaining bread slices, buttered sides up. 5. Heat a large skillet or griddle over medium heat. 6. Place sandwiches in skillet. 7. Cook, turning once, until cheese is melted and bread is toasted, about 2 to 3 minutes. ---------------------------------------------------------------------------
Nutrition
Ingredients
