The “I’ll have the beef” way of stating an order doesn’t come off as rude or imposing. There are only a few ways of saying what you want and people like variety, perhaps it’s that which makes it a normal phrase
If you don’t like being wrong (“I’ll have the spaghetti”; “no you won’t, we’ve sold out”) you can use phrases like “may I get …” or “I would like …” or in reply to whatever the waiter asks “the pasta marinara” with no introductory words
The “I’ll have the beef” way of stating an order doesn’t come off as rude or imposing. There are only a few ways of saying what you want and people like variety, perhaps it’s that which makes it a normal phrase
If you don’t like being wrong (“I’ll have the spaghetti”; “no you won’t, we’ve sold out”) you can use phrases like “may I get …” or “I would like …” or in reply to whatever the waiter asks “the pasta marinara” with no introductory words