Here are some key phrases used to discuss food in a restaurant when ordering and deciding on what to eat:
Could I have a menu, please?
Here you are.
Enjoy your meal!
Would you like ...
Can I get you anything else?
I'd like the check, please.
That'll be ...
Have a good day!
The spaghetti/steak/chicken looks good.
How is the pizza/fish/beer?
What would you recommend?
I'd like my steak rare/medium/well done.
Are there any nuts/peanuts? My child has allergies.
Do you have any vegetarian dishes?
Could I have a glass of water, please?
Could you tell me where the restroom is?
I'd recommend the lasagna/steak/pizza.
Would you care for an appetizer/a beer/a cocktail?
I'd like to have a beer/steak/glass of wine.