Initially add cubes of Mangalore cucumber, ash gourd and Ivygourd to the cooking pan. Add half a cup of water and cook covered. When these veggies cook halfway, include chopped pumpkin, sweet potato and cashews.
Continue cooking till all the veggies are cooked soft. Meanwhile add maida flour and little water in a small bowl and mix together. It should be lump free.
Next, take fresh coconut and half cup of water in a mixer. Grind together to fine paste. Pour over strainer and squeeze to extract thick coconut milk. Grind this squeezed coconut again with some water and extract thin coconut milk.
Keep aside both coconut milk. Add some salt and slit green chillies to cooking veggies.
When the veggies are perfectly cooked, add thin maida paste and mix well. Maida gives creamy and thick consistency. Next add thin coconut milk and cook for a few minutes.
Finally add thick coconut milk and bring it to boil. Switch off once done. Heat a tempering pan with all the ingredients under 'to temper' list and when they sizzle pour over the curry.
Creamy and coconut flavored valval is ready to be served with rice.