In a pan take oil - butter together and heat them.
Add bay leaf, cinnamon sticks, cumin seeds for tempering.
Now add onion and garlic and saute for some time.
Now add all the vegetables, mixed herbs and cook for 5-7 minutes.
Now add the cooked vegetables at the bottom of the baking tray.
In another pan heat butter and roast whole wheat flour properly.
Now add milk by continuously mixing with a whisk.
Add salt and pepper powder and cook for some time till it becomes a bit thick.
Now switch off the gas and let the white sauce cool.
Divide the white sauce into three parts- leave one part as it is, add spinach puree to 2nd part and tomato puree to the 3rd part.
Now sprinkle some mixed herbs on the vegetables.
Cover the vegetables with the three coloured white sauce.
Now top the white sauce layer with grated cheese and 3-4 tbsp butter.
In a pre-heated oven bake the dish at 200 °C for 20-25 minutes.
Bake the dish till golden brown colour crust is formed and the cheese melts completely.
A very healthy, one pot meal and colourful vegetable au gratinis ready to be serve!!!
