Gouda Stuffed Burgers with Horseradish Aioli and Caramelized Onions

INGREDIENTS

/3 cup Mayonnaise

1 tsp

finely minced Fresh Garlic

1 tbsp

Prepared Horseradish

1 tsp

finely chopped Fresh Parsley

1/2 tsp

Lemon Juice

1 1/2 tsp

Salted Butter

1 1/2 tsp

Olive Oil

extra large Red Onion

1/8 tsp

Kosher Salt

lbs Ground Beef (80/20 mix works best)

2 tbsp

Worcestershire Sauce

1 tsp

Salt, plus extra to taste

3/4 tsp

Black Pepper, plus extra to taste

1/2 tsp

Garlic Powder

4 1/2 oz

Gouda Cheese, grated

Hamburger Buns

3 oz

Baby Arugula

Prepared Caramelized Onions

Prepared Horseradish Aioli