I see nothing wrong with using something that will give us a head start. Like the pastry cream posted, much less time and still a very good product. I almost always make everything from scratch, but am always willing to give a new product or one new to me a try. I see no reason to reinvent the wheel every meal. But then, I am not a chef! Some things I won't use at all, but if someone else likes it, I think it is fine.
Be an organ donor; give your heart to Jesus.
Exercise daily; walk with the Lord.