Smear butter or ghee over the bread and toast until golden on one side. You can skip toasting if you prefer to make it in a toaster or grill.
Heat 1 tbsp ghee, add ginger/ garlic and cumin. Saute until garlic smells good. Switch off the stove.
Add paneer, red chili powder, masala powder, turmeric, salt, coriander leaves, lemon juice or amchur powder and mix very well. Do not cook further. Taste and check the spice and salt levels.
Place this over the bread and place onion rings, tomatoes, coriander leaves and other leafy greens like lettuce if you have.
You can also grill or toast these in a electric oven or toaster or griller.
Halve the paneer bhurji sandwich and serve.