> 1/2 cup cider vinegar
> 2 tbsp honey
> 1 (12 oz) bag broccoli slaw
> 1/2 (8 oz) pkg sliced white mushrooms
> 3 tbsp olive oil
> 1/2 cup diced onion
> 2 tsp garlic powder
> 3/4 lb 85% lean ground beef
> 4 whole wheat hamburger buns
In a large bowl, whisk the vinegar and honey together. Add the broccoli slaw and toss to combine. Season with salt and pepper. Cover and refrigerate.
In a food processor, pulse the mushrooms until finely chopped, scraping sides of bowl, if needed.
In a large nonstick skillet, heat 1 tbsp oil on medium-high. Add the onion and cook 4 min., until golden. Add the mushrooms and garlic powder and cook 8 min., until liquid has been released and mostly evaporated, stirring often. Transfer mushrooms to a large bowl and cool 5 min., until no longer hot. Add the ground beef. Combine and form into four 4-inch patties. Season on both sides with salt.
Wipe out the skillet and add remaining 2 tbsp oil. Heat on medium-high. Add burgers and cook 3-4 min. per side. Place 1 burger on each bun and top with broccoli slaw.