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Grilled Cheese with Balsamic Red Onions
and balsamic-roasted brussels sprouts

Active: 45 Total: 45

Caramelized onions offer just enough tart-sweet flavor to balance the richness of the cheese in this meal that was last featured in 2019.
Smarts: Preparing the caramelized onions is the only time-consuming step in this recipe, so be sure to do that ahead of time if you want to save yourself some time right before dinner.

Ingredients

Servings:
4
Metric
Grilled Cheese with Balsamic Red Onions:
  • Onions, medium red - 1, sliced
  • Oil, cooking - 1 Tbsp
  • Vinegar, balsamic - 1 1/2 Tbsp
  • Brown sugar - 2 tsp
  • Bread, sandwich - 8 slices
  • Butter - 4 Tbsp
  • Jam or jelly - 8 Tbsp (like strawberry)
  • Cheese, fontina - 4 slices (sub provolone or swiss)
Balsamic-Roasted Brussels Sprouts:
  • Brussels sprouts - 1 lb, trimmed and halved
  • Foil - for cooking
  • Oil, cooking - 1 1/2 Tbsp
  • Vinegar, balsamic - 1 1/2 Tbsp
  • Mustard, Dijon - 2 tsp
  • Brown sugar - 1 Tbsp
  • Salt - 1/4 tsp

Nutrition Facts

Serving Size: 1 serving
Servings Per Recipe 4
Amount Per Serving
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Prep

  1. Onions / Brussels sprouts - (If prepping right before cooking, get oven heating before continuing with prep.) Prep as directed. Larger brussels sprouts should be quartered. Store separately. (Can be done up to 5 days ahead)
  2. Caramelize onions - Heat up a frying pan over medium heat. Add oil (portion for sandwiches) and then add onions to heated oil. Saute for ~10 minutes, until tender but still crunchy. If it looks like the onions or pan will burn at any point, just add a splash of water. Stir in vinegar and brown sugar (portions for sandwiches). Cook for another 2 minutes. (Can be done up to 5 days ahead)

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Make

  1. Heat oven to 500F / 260C.
  2. Spread brussels sprouts out onto a sheet pan. Cover tightly with foil and then bake for ~6 minutes.
  3. Remove foil and toss Brussels sprouts with oil, vinegar (portions for Brussels sprouts), and mustard. Roast for another 8 to 10 minutes until crispy. Toss with brown sugar (portion for Brussels sprouts) and salt, seasoning with more to taste.
  4. While Brussels sprouts roast, butter one side of each piece of bread. Lay out bread, buttered-side down. Layer 1/2 of slices with with jam, onions, cheese and top with remaining bread, buttered-side up. Continue until all sandwiches are assembled.
  5. Heat up a griddle or a skillet over medium heat. Place sandwiches onto heated surface (as many as can fit) and press down throughout the grilling process with a spatula. Flip once the first side is golden, ~ 3 to 4 minutes.
  6. Enjoy sandwiches with Brussels sprouts on the side.

Nutrition Facts

Serving Size: 1 serving
Servings Per Recipe 4
Amount Per Serving
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% Daily Value
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Reviews

Ratings

Original (25)
Gluten-free (2)
Paleo (3)
Vegetarian (8)

21 reviews

We LOVED this and may keep the onions on hand for future flavor-boosting purposes. The Brussels sprouts were a nice side.

By: Kirsten
Posted: Apr 02, 2021
Diet: Vegetarian
0 Helpful

I bought a sliced ham and added two slices for additional protein/content. I also glanced over the details and didn't add vinegar or brown sugar to the onions, while also cooking them with butter, salt, and pepper, and the sandwiches as a result weren't too sweet.

By: Doug
Posted: Mar 28, 2021
Diet: Original
0 Helpful

I liked the speed of this meal, but the flavor profile overall was too sweet for my liking.

By: Jenna
Posted: Mar 23, 2021
Diet: Original
0 Helpful

I think this is the first CookSmarts recipe I made that I ended up really not liking for finishing. 😩

By: Abby
Posted: Feb 20, 2021
Diet: Original
0 Helpful

I think this was the first CS recipe I made 7 years ago and it’s always a favorite!

By: Amanda
Posted: Feb 16, 2021
Diet: Vegetarian
0 Helpful

Sandwich was too sweet (would omit the jam, use extra butter to toast, and add extra cheese). Brussel sprouts weren't our favorite either.

By: Jessica
Posted: Feb 16, 2021
Diet: Gluten-free
0 Helpful