( MAKES Enough filling for 1 loaf bread )
Photo by Tam West
- In a saucepan mix together onion, onion soup mix, evaporated milk, cream, mustard powder, grated cheese, lemon zest, a grind of black pepper and a grate of nutmeg.
- Gently heat and stir to melt cheese and thicken. Remove from heat, add the lemon juice and leave to cool 5 minutes. Generously spread on to slices of fresh white bread. Roll into thirds, brush with butter and toast in a sandwich maker (set so it doesn't squash them), until golden and just bursting. You can also bake them in the oven, seam side down.