It says "serves 2", but I ate the whole lot the first time I made this. If you don't sauté the onions too long, they'll still have a bit of bite in the soup and it's amazing! I only blended mine a little, I like texture in my soup.
I'm confused, what do you mean you have no way of juicing a lemon? All you need is one hand, and a fork to make it even easier. Pre-packed lemon juice can only be inferior. It should also be punishable by law to needlessly create packaging and waste for something that already comes in a natural non-polluting package. You decide how much you want to compromise with your taste buds and conscience!