Lunch

Halloumi and Portobello Sourdough Toastie

Name: Halloumi and Portobello Sourdough Toastie
Prep time: 15 min
Total time: 15 min
Yield: 1 serving
Ingredients: 2 slices, about 100 g Sourdough; 60 g Halloumi; 1 large, about 80 g Portobello mushrooms; 30 g Spinach; 1 tsp (7 g) Balsamic glaze; A few sprigs, leaves picked Fresh thyme; 3 sprays Olive oil spray; To taste Black pepper

Portobello and halloumi fried in the same pan, layered on sourdough with spinach, thyme and a teaspoon of balsamic glaze, then pressed. 24 g of protein for 464 kcal.

Calories: 464kcal
Protein: 24g
Fat: 17g
Carbs: 53g

Per serving, makes 1. 15 minutes of work. Published 8 September 2026.

Allergens

Gluten
Milk
Sulphites

Flags follow UK labelling rules and come from the ingredients as listed, not from any particular brand. Check the packet before cooking for somebody with an allergy.

Ingredients

Sourdough2 slices, about 100 g
Halloumi60 g
Portobello mushrooms1 large, about 80 g
Spinach30 g
Balsamic glaze1 tsp (7 g)
The glaze is 40% sugar, so it is one teaspoon and weighed.
Fresh thymeA few sprigs, leaves picked
Olive oil spray3 sprays
Counted at a quarter of a gram per spray, which is what the nozzle on most bottles delivers. Four sprays is 9 kcal.
Black pepperTo taste

Method

Slice the mushroom thickly and fry it in a sprayed pan over a high heat with the thyme for three minutes a side, until it has darkened and stopped leaking. Push it aside and fry the halloumi slices for two minutes a side.
Wilt the spinach in the pan for thirty seconds and press out the water.
Layer the mushroom, halloumi, spinach and glaze between the sourdough slices with pepper. Wipe the pan, return the sandwich to a medium-low heat with a weight on top, and toast for three minutes a side until crisp.

Worth knowing

Mushrooms let go of a lot of water. Cook them until the pan is dry again or the toastie is wet inside.
Two slices of sourdough are the biggest single number in this sandwich. One slice with the top left open brings it down by a good margin.

Other lunch recipes that share ingredients with this one, or every lunch between 450 and 600 calories a serving.

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Macros are calculated from the weights listed above using standard food composition values, and will shift with your own brands and measuring. Weigh what you can. This is a recipe, not dietary advice. The full health disclaimer is below.