French Onion Burgers

🥘 Ingredients

• Gruyère cheese
  1 c
• beef stock concentrate
  2 unit
• brioche buns
  4 unit
• butter
  1 tbsp
• flour
  2 tbsp
• ground beef
  20 oz
• kale
  8 oz
• milk
  ½ cup
• nutmeg
  0.13 tsp
• olive oil
  2 tbsp
• pepper
• salt
• sugar
  1 tsp
• thyme
  ½ oz
• yellow onion
  2 unit

🍳 Cookware

• baking sheet
• large pan
• grater
• small pot
• baking sheet

1. 

   1

   Wash and dry all produce. Preheat oven to 350 degrees. Halve, peel, and thinly slice yellow onion . Remove stems and large ribs from kale , then tear leaves into bite-sized pieces. Toss on a baking sheet with a drizzle of olive oil and a pinch of salt and pepper . Bake in oven until crisp, 10-12 minutes. TIP: Keep an eye on these—they can burn quickly.

   yellow onion: 2 unit, kale: 8 oz, olive oil: 2 tbsp, salt, pepper
2. 

   2

   Heat a drizzle of olive oil in a large pan over medium heat. Add onion and thyme sprigs. Cook, tossing, until soft and browned, ⏱️ 8 minutes . Stir in beef stock concentrate , sugar , and ¼ cup water. Simmer until onion is jammy, ⏱️ 3 minutes . Remove and discard thyme sprigs. Remove onion from pan and set aside. Wipe out pan.

   thyme: ½ oz, beef stock concentrate: 2 unit, sugar: 1 tsp
3. 

   3

   Meanwhile, grate Gruyère cheese on large holes of a grater . Melt butter in a small pot over medium heat. Add flour and stir until lightly toasted, about ⏱️ 1 minute . Slowly whisk in milk (we sent more), then simmer until thickened, ⏱️ 2 minutes . Season with a pinch of nutmeg (we sent more than needed), salt , and pepper . Set aside off heat.

   Gruyère cheese: 1 c, butter: 1 tbsp, flour: 2 tbsp, milk: ½ cup, nutmeg: 0.13 tsp, salt, pepper
4. 

   4

   Shape ground beef into two evenly sized patties (they should be slightly larger than the buns). Season all over with salt and pepper . Heat a drizzle of oil in pan used for onion over medium-high heat. Add burgers and cook until just shy of desired doneness, ⏱️ 4 minutes per side (3-5 minutes). Sprinkle cheese on top of each burger, cover pan, and cook until cheese melts, ⏱️ 2 minutes .

   ground beef: 20 oz, salt, pepper
5. 

   5

   While burgers cook, split brioche buns half and place on a baking sheet . Toast in oven until golden, ⏱️ 3 minutes (2-3 minutes).

   brioche buns: 4 unit
6. 

   6

   Spread béchamel onto buns, then fill with burgers and onion. Serve with kale chips to the side.