Balsamic Blue Burgers on Kaiser Rolls

For dinner tonight, my husband was FINALLY joining me! I decided to make something he'd really enjoy. I saw these Kaiser Rolls in Annie's blog a few weeks ago, and knew they would be delicious! She warned that you had to plan ahead for this one because the rolls take 2 days to make. They have to rise and be punched down, and rise and shape, and rise and flip, and rise, and rise and rise! Mine didn't come out exactly as I hoped because I used whole wheat flour and bread flour, and the whole wheat just doesn't leave the same texture. Next time I make these, I'll be using all bread or AP like the recipe states.
For the burgers, I wanted to make something filling and flavorful, so I made a balsamic and blue cheese burger. They were delicious! I served the burgers with asparagus and a salad.

Balsamic Blue Burgers on Kaiser Rolls

1 lb. 96% lean ground beef
1/2 yellow onion, grated
1 tbsp. worchestershire sauce

2 tbsp. balsamic vinegar, separated
Garlic Salt
Pepper
Pinch of crushed red pepper flakes
1/2 yellow onion, sliced

8 button mushrooms, sliced

2 oz. crumbled blue cheese

Preheat a nonstick skillet to medium heat.

Add onions and mushrooms, sautee for 10 minutes, or until softened.

Add 1 tbsp. balsamic vinegar, salt and pepper. Turn heat off.
Preheat grill pan to medium-high.

Gently toss ground beef, onion, worchestershire, 1 tbsp. balsamic vinegar, salt, and peppers in a bowl.

Form into 4 patties.

Grill for 4 minutes on the first side.

Top each burger with 1/4 of the mushroom/onion mix and 1/4 of the blue cheese crumbles.

Grill on the second side for 5 more minutes.

Plate on the roll and serve.

A Year Ago: Oddly enough, burgers on homemade wheat rolls for the NASCAR Vegas Race! Chipotle Cheddar Sliders on Whole Wheat Yeast Rolls