You should store fresh rotis in a hot box with a cloth, as it keeps them warm for hours.
Adding spoonful of curd in onions while browning without burning.
Make a leftover dal dough to make nutritious and flavorful parathas with no wastage.
Before using raw onions in recipes or salads, soak them in cold water to lesser down the sharpness.
It's a tiny bit of salt while grinding that helps spices blend smoother and also enhances their shelf life.
This is old-school idea but its effective and placing a clean silver spoon isn boiling milk delay the spoilage.
Use leftover water from boiled rice to make your dals and sabzis as a natural thickener, adding starch and flavor.