Lunch · 15 min · british

Cheese and Onion Toastie

Dinner decisions, handled: Cheese and Onion Toastie pairs thick white bread with mature cheddar for a 15-minute British lunch. Each serving lands at 760 calories with 35g of protein, so it eats like a much heavier meal. Naturally vegetarian, it scales cleanly if you are cooking for more than one.

✓ USDA-verified nutrition data

Ingredients

• 4 slices Thick white bread
• 225 g Mature cheddar
• 0.5 Yellow onion
• 3 tbsp Butter
• 1 tsp Dijon mustard

Steps

1. Grate the cheddar and slice the onion paper-thin. Thin onion softens in the heat; thick onion stays raw and crunchy — and not in a good way.
2. Butter the outside of each bread slice. On the inside, spread mustard, pile on the cheese, and scatter the onion.
3. Cook in a skillet over medium-low heat, 3 to 4 minutes per side, pressing gently, until the bread is deep golden and the cheese is fully molten. Low heat is key — high heat burns the bread before the cheese melts.
4. Rest 1 minute so the cheese sets slightly, then halve on the diagonal. The diagonal cut is not optional; it’s science.
5. Serve with pickles and crisps. The toastie is Britain’s greatest sandwich, and this is its definitive form.

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