Can you please check if the indefinite article is correct? I followed your advice.

1) I'll have a : chicken breast, a roast leg of lamb, a sirloin steak, a boiled egg, a cod, a plaice, a sole, a half-litre bottle of waer
no article with: braised beef,grapefruit juice, bread
2) How do you serve pasta with in America? (With a meat sauce, gravy, tomato sauce, butter and sage?)
3) Would you like a fried egg with asparagus or lamb with spinach and cauliflowers for your main course?
4)Would you like anything to drink?
5) Could I have a glass of fizzy (sparkling) water and some grapefruit juice?

2. How do you serve pasta in America? With meat sauce, gravy, tomato sauce, butter, and sage.

3. For your main course, would you like a fried egg with asparagus, or lamb with spinach and cauliflowers?

1) Your use of the indefinite article in the first sentence seems to be correct. You have used "a" before each food item, indicating that you are ordering one of each. However, there is a spelling mistake in "water" (you wrote "waer"). Additionally, you have correctly identified that no article is needed before "braised beef" and "grapefruit juice" in that sentence.

2) In the second sentence, you are asking how pasta is typically served in America. To answer this question, you could consult American recipes or culinary sources to gain an understanding of common pasta dishes in the country.

3) In the third sentence, you are offering the choice between a fried egg with asparagus or lamb with spinach and cauliflower for the main course. The use of the indefinite article "a" is correct here as you are presenting options for one main course.

4) The fourth sentence is a simple question asking if the person would like anything to drink. No article is needed before "anything" in this context.

5) In the last sentence, you are requesting a glass of fizzy water and some grapefruit juice. Again, you have used the indefinite article "a" correctly before "glass" and "some" before "grapefruit juice" to indicate an unspecified quantity.