Bistro Burger

From Bobby Flay's Burgers, Fries, and Shakes, page 26.

We didn't think this was one of his most exciting burgers, but it was interesting enough to share.  It's also very easy to make.

3 Tbs. white wine vinegar

1 heaping Tbs. Dijon mustard

Kosher salt and freshly ground black pepper

1/3 cup extra-virgin olive oil

1 large head of endive, thinly shredded

1 1/2 lbs. ground chuck (80/20) or ground turkey (90/10)

1 tsp. coarsely ground black pepper

1 1/2 Tbs. canola oil

4 slices Gruyere cheese, each 1/4" thick

4 brioche or regular hamburger buns, split; toasted, if desired

Whisk together the vinegar and mustard in a medium bowl and season with salt and pepper.  Slowly add the olive oil and whisk until emulsified.  Add the endive to the bowl and toss to coat.  Let sit at room temperature for 15 minutes before serving.

Divide the meat into 4 equal portions.  Form each loosely into a 3/4" thick burger and make a deep depression in the center with your thumb.  Season both sides of each burger with salt and coarsely ground black pepper.

Cook the burgers (click HERE for Bobby's burger cooking times), using the oil and topping each one with a slice of cheese and a basting cover during the last minute of cooking.

Place the burgers on the bun bottoms and top each one with some of the endive.  Cover with the bun tops and serve immediately.

Notes:

- I only saw small heads of endive, so I grabbed two of the biggest ones I could find.

- As usual, I used 1 lb of 90/10 ground beef.

- If you don't have a basting cover, use whatever you can find--a metal bowl, a pot lid, whatever.