delicious lunch

I had fried fish and chips for lunch. Because the food is very delicious, I like it very much. I also had bread.

However if you wish to tell others how much bread you had, then say 'a loaf of bread' and not 'a bread'.

Bread is considered uncountable, but one can count loaves of bread(loaves is plural of loaf), slices of bread; just as rice cannot be counted, but spoonfuls of rice, bowls of rics can be counted.

Also, 'I had bread' is a better way of saying 'I ate bread'

Articles like a, an are not used before breakfast, lunch, dinner, but they are used before 'meal'.

Eg: I had breakfast, instead of 'I had a breakfast',

     But this can be said 'I liked the breakfast.'  I liked breakfast is incorrect.

     I had a meal. The meal was good.

Also, food is singular, no matter how many dishes you had. So 'I liked it very much'

 Hope I was of help.

Delicious lunch

I had fried fish and chips for the lunch. Because the food are It was very delicious, and I liked it a lot. I also ate bread with it.

[You could have just said "It was very delicious."  It would be assumed then that you liked it very much (or 'a lot')]