Preheat the oven at 180 C. Apply the butter on one side of the bread and toast the bread for 5 mins. Alternatively One can grill the slices with some butter in a pan.
When the bread slices are grilling, in a wide bowl, chop the tomatoes and add the Feta Cheese or crumbled paneer .
Lightly crush the spice mix in between your palms and add it to the mix. Add salt and Red chilli flakes if using. Add olive oil and gently mix Everything.
Once your bread is slightly toasted, spread the mixture on the bread slices.
Top this up with some grated mozzarella cheese. (One can use cheddar too).
One can sprinkle some red chilli flakes or black pepper powder if required at this point.
Grill for another 5 minutes, just until the cheese melts or Cover and grill on a pan for 5 mins.
Yummy open Faced Grilled Cheese Tomato Sandwiches are ready. Serve it warm.