To make it creamy and devoid of ice crystals, add some milk powder to the milk to make ice cream. This will soak up the moisture in the milk and not let ice crystals form.
A simple hack to preserve freshly made ginger garlic paste is by adding the following: 1. Some salt 2. Some oil 3. Some lemon juice This will allow ginger garlic paste to stay well for a few weeks and also enhance the flavour of the paste.
While browning onions for a gravy or a curry, add a little sugar (I add brown sugar) to the onions. The ratio is 1 Teaspoon to 1 Kilogram of onions. Once the onions have been slowly cooked down, they release their spicy notes and tear-inducing gasses and leave only sweetness behind. This will help in the caramelization process to move faster and save you time. It will also help in making a richer and delicious gravy.
Before deep or shallow frying, adding a pinch (only a pinch) of salt to the hot oil is recommended. This does the following: 1. Uses less oil than normal. 2. Doesn't allow steam to build up 3. It helps to prevent oil splatter. Salt absorbs moisture from food, which helps control oil splatter.