1 1/2 pounds ground hamburger
2 tablespoons good quality dijon mustard (I used a blue cheese dijon mustard by Vineyard Pantry)
1 teaspoon kosher salt
1 teaspoon freshly grated pepper
3 tablespoons extra virgin olive oil and some to grill burgers
Mix all ingredients and loosely mix with a fork. Form five 3-inch patties. Brush grill pan with olive oil and grill burgers 3-4 minutes each side for medium to medium well. I used warmed naan bread as buns, and topped burgers with red onion, tomatoes, lettuce, and favorite condiments.
Enjoy!