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Retro Burger

Retro Burger

with Caramelized Onions and Roasted Sweet Potatoes

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Our dinnertime creation is the Retro Burger. Caramelized onions, cheddar cheese, flavourful buns and perfectly packed patties. This burger comes together quickly and will make your weeknights delicious!


Produced in a facility that processes milk, sesame, eggs, fish, shellfish, crustaceans, mustard, tree nuts, peanuts, wheat, soybean and sulphites.

Preparation Time30 minutes
Cooking difficultyEasy
serving amount
Ingredientsarrow down iconarrow down icon
serving amount

250 g

Ground Beef

2 tbsp

Whole Grain Mustard


6 g


¼ cup

Cheddar Cheese, shredded


2 tbsp


(ContainsMustard/Moutarde, Egg/Oeuf)

2 unit

Artisan Bun


113 g

Onion, sliced

340 g

Sweet Potato

1 tbsp

Balsamic Vinegar


¼ cup

Panko Breadcrumbs


Not included in your delivery

1 tsp


2.5 tbsp


¾ tsp

Salt and Pepper*

Nutrition Values
Nutrition Valuesarrow down iconarrow down icon
per serving
per 100g
Calories1120 kcal
Fat67 g
Saturated Fat17 g
Carbohydrate89 g
Sugar19 g
Dietary Fiber9 g
Protein40 g
Cholesterol130 mg
Sodium1610 mg
Utensilsarrow down iconarrow down icon
Baking Sheet
Parchment Paper
Measuring Spoons
Large Non-Stick Pan
Medium Bowl
Small Bowl
Instructionsarrow up iconarrow up icon
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Before starting, preheat the oven to 450°F. Wash and dry all produce.

Cut sweet potatoes into 1/4-inch thick fries. Add sweet potatoes with 1 tbsp oil (dbl for 4 ppl) on a parchment-lined baking sheet. Season with salt and pepper, then toss to coat. Roast in the middle of the oven, flipping halfway through cooking, until golden-brown, 20-22 min.


While sweet potatoes roast, heat a large non-stick pan over medium heat. When hot, add 1 tbsp oil (dbl for 4 ppl), then onions. Cook, stirring occasionally, until slightly softened, 3-4 min. Add 1 tsp sugar (dbl for 4 ppl) and season with salt. Cook, stirring occasionally, until dark golden-brown, 5-6 min.


While onions cook, peel, then mince or grate garlic. Combine beef with panko, garlic, half the mustard, 1/4 tsp salt and 1/4 tsp pepper (dbl both for 4 ppl) in a medium bowl. (TIP: If you prefer a firmer patty, add 1 egg to the burger mixture.) Form beef mixture into two 4-inch wide burger patties (four patties for 4 ppl). Lightly press a thumbprint into each patty.


When onions are done, remove pan from heat. Stir in vinegar until absorbed, 1 min. Transfer onions to a small bowl. Carefully wipe pan clean. Heat the same pan over medium-high. When hot, add 1/2 tbsp oil (dbl for 4 ppl), then patties. Pan-fry, until cooked through, 4-5 min per side.**


While patties cook, halve buns and arrange them on another baking sheet, cut-side up. Sprinkle cheese over bottom buns. Toast in the top of the oven, until cheese melts and top buns are golden, 2-3 min. (TIP: Keep an eye on your buns so they don't burn!)


Stir together mayo and remaining mustard in another small bowl. Spread mayo-mustard on toasted top buns. Divide patties between buns. Top with caramelized onions. Serve with roasted sweet potatoes alongside.