1 xbd cups chopped sautxe9ed mix vegetables (I have used Sweet corn, Purple cabbage, French beans, tomatoes)
Mix the maida with the milk and remove lumps if any.
Heat butter in a pan.
Add the milk-maida to it. Let it boil for a few minutes and it starts thickening.
Add the other ingredients-mustard powder, pepper powder, cheese and salt. Mustard powder adds a nice zing to the sauce.
Cook for a few more minutes. (Adjust the proportion of maida depending on the consistency of the sauce required. I made this semiliquid-not too thick nor too thin.)
You can also first cook the Maida directly in the butter without blending it with the milk and then add the milk. I usually end up with lumps in my sauce that way so I prefer the first blending and then cooking method!
Add cooked/ sautxe9ed vegetables to the white sauce. (Add some green chillies to the veggies while cooking to make it spicer.) Mix nicely till the white sauce coats the veggies.
Cool and divide into four portions
Spread some butter on one side on each bread slice.
Spread one portion of the filling on one slice of bread and top with another slice
Brush a little butter on the outer surface of the sandwich and Grill in a sandwich toaster till golden brown.
Repeat with remaining bread slices.
Cut as shown in the photo to make a butterfly sandwichJ