A ‣ Ways of cooking food 
You
boil potatoes or rice in a
saucepan.
You can fry sausages in a frying pan.
You grill toast or meat under a grill.
You roast meat [using oil] in the oven.
You also bake cakes [without oil] in the oven.
You barbecue meat and fish on a barbecue.
Food which is not cooked is raw.
B ‣ Preparing and cooking food 
Peel the potatoes [remove the skin] and boil them.
While they’re boiling, chop an onion. [cut it into small pieces]
Fry the onion before adding some chopped tomatoes. [putting them together with the onions]
Then stir it all for a few minutes. [move it around in a saucepan using a spoon]
C ‣ What does it taste like? 
Chefs [people who cook food in a restaurant as a job] always taste the food [put a small amount in their mouth to see what it is like] while they are cooking.
I don’t like the taste of too much garlic.
I tried the soup and it tasted a bit strange.
Michel’s food is very tasty [has a good taste].
Indian food is a bit too spicy for me [with a strong hot flavour].
You get ice cream in different flavours [the type of taste that food or drink has, e.g. vanilla, coffee, strawberry, etc.].
Lena said her pasta was horrible [terrible, unpleasant], but I thought it was delicious [fantastic, with a wonderful taste].
Language help
We use the word sour to describe the taste of lemons (opp sweet), but usually bitter to describe coffee that is strong and has a sharp unpleasant taste (opp smooth). Strong, dark chocolate can also be described as bitter, but this is not always negative.
D ‣ Are you a good cook? 
apple pie“I’m a bit nervous when I cook, so I always follow a recipe [the cooking instructions for a particular dish, e.g. lasagne], and make sure I have all the right ingredients [the different food you need to make a particular meal] before I start. However, I am quite good at making pies, especially apple pie.” (Pie is pronounced /paɪ/ like ‘my’.)
Common mistakes
A person who cooks well is a good cook (NOT a good cooker). The cooker is the large piece of equipment you use for cooking. You could also say that you are good/bad at cooking (NOT good/bad in cooking), e.g. I’m quite good at cooking fish.
Also we ‘cook’ a type of food, e.g. I’m cooking some beef, but we ‘make’ a dish, e.g. I’m making dessert. (NOT I’m cooking dessert.)