Grilled Beef and Onion Sandwich

These are easy and delicious sandwiches for a frosty, cold day. From www.landolakes.com

• Ready In: 32 mins
• Serves: 4

Ingredients

• 3⁄4 cup  thinly sliced red onion
• 3⁄4 cup  thinly sliced  white onion
• 2  tablespoons honey
• 1  tablespoon country-style dijon mustard
• 1  tablespoon cider vinegar
•  land o'lakes butter, softened
• 8  slices  rye bread
• 1⁄2 lb  thinly sliced deli roast beef
• 4  slices American cheese

Directions

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.