Cheesy Beef Patty Melt (Print Version)

# Ingredients:

→ Secret Sauce

01 - ¼ cup of creamy mayonnaise
02 - 2 tablespoons of classic ketchup
03 - 1 tablespoon of tangy dijon mustard
04 - 1 teaspoon of zesty pickle juice
05 - ¼ teaspoon of smoky paprika
06 - ¼ teaspoon of garlic powder

→ Patty Melts

07 - 2 tablespoons of good quality olive oil
08 - 2 large onions, thinly sliced
09 - 12 ounces of juicy 85/15 ground beef
10 - ½ teaspoon of sea salt
11 - ½ teaspoon of freshly ground black pepper
12 - 1 teaspoon of rich worcestershire sauce
13 - 8 slices of fresh rye bread
14 - 3 tablespoons of unsalted butter, softened
15 - 4 slices of nutty swiss cheese
16 - 4 slices of sharp cheddar cheese

# Instructions:

01 - Mix together the mayonnaise, ketchup, dijon mustard, pickle juice, paprika, and garlic powder in a bowl until smooth and well combined. Set this flavor-packed sauce aside while you prepare the rest.
02 - Heat up your olive oil in a skillet over medium-low heat. Once warm, add your thinly sliced onions and let them work their magic, cooking slowly until they transform into a deep golden brown color - this'll take about 30 minutes of patience. If you notice them starting to dry out or threaten to burn, just add a splash of water and lower the heat a bit. Once they're perfectly caramelized, set them aside.
03 - In a mixing bowl, combine your ground beef with salt, pepper, and that wonderful worcestershire sauce. Mix it all together and shape into four thin, oblong patties that'll match your bread slices. Cook them in a skillet over medium heat until they're beautifully browned on both sides, then set aside. Give the pan a quick wipe to clean up any excess grease.
04 - Here comes the fun part! Butter one side of each bread slice. Now, let's build these beauties on a medium-heat skillet: Start with bread (buttered side down), add swiss cheese, your seasoned beef patty, those gorgeous caramelized onions, a generous spread of your secret sauce, sharp cheddar cheese, and finally the top slice of bread (buttered side up). Grill each side for 1-2 minutes until golden brown and crispy, with all that cheese melted to perfection.

# Notes:

01 - The secret sauce makes more than enough for four sandwiches - keep the extra in a sealed container in your fridge for next time!