Caramelized Onion Tartines

Slow-cooked onions bring out their natural sweetness, making them perfect for a simple yet satisfying lunch on toasted bread.

Prep Time

15 minutes

Total Time

45 minutes

Calories

425

Level

Easy

Yields

4 servings

Cost

£1.51

Season:

☀️ Summer

Meal Type:

Breakfast•Lunch•Dessert•Bread

Cuisine:

British

Main Ingredient:

Vegetarian

Cooking Style:

Quick & Easy•Slow Cooker•Baking

Occasion:

Weeknight Dinner

Mood:

Light & Fresh

Ingredients

Servings

3largeYellow Onions(thinly sliced)

£1.00

2tablespoonsOlive Oil(extra virgin)

£0.20

1tablespoonButter(unsalted)

£0.15

1teaspoonFresh Thyme(leaves only)

£0.30

1tablespoonBalsamic Vinegar(optional, for a touch of tang)

£0.10

0.5teaspoonSalt(or to taste)

£0.01

0.3teaspoonBlack Pepper(freshly ground, or to taste)

£0.02

4slicesBread(sourdough or baguette, toasted)

£0.50

4ouncesGoat Cheese(optional, for topping)

£2.75

1cupFresh Arugula(optional, for topping)

£1.00

Total Cost

£6.03

£1.51 per serving

The Method

1
Heat olive oil and butter in a large skillet over medium-low heat. Add sliced onions and thyme.
2
Cook, stirring occasionally, for about 20-30 minutes, or until the onions are very soft, golden brown, and caramelized. Adjust the heat as needed to prevent burning.
3
If using, stir in balsamic vinegar during the last 5 minutes of cooking.
4
Season with salt and pepper to taste.
5
Toast the bread slices.
6
Divide the caramelized onions evenly among the toasted bread slices.
7
Top with goat cheese and fresh arugula, if desired.
8
Serve immediately.

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My Notes

Nutrition Information

Nutrition per serving (200g)

425 kcal / 1778 kJ

Carbs

44g

17% of RDA

Fat

22g

31% of RDA

Protein

15g

30% of RDA

Detailed Breakdown

Fibre

5 g

17% of RDA

Sugar

17 g

19% of RDA

Sodium

550 mg

24% of RDA

Saturated Fat

8 g

40% of RDA

Chef's Tips

Low and slow cooking is key for caramelized onions. Don't rush the process.

Adding a pinch of sugar can enhance the caramelization, but it's usually not necessary.

Store leftover caramelized onions in the refrigerator for up to 3 days.

Try other toppings such as prosciutto, roasted red peppers, or a fried egg.

Cooking Equipment

Oven

Stove

Large skillet

Wine Pairings

No wine pairing suggestions available for this recipe.

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