Quick and easy salad dressing (lemon juice + olive oil)
Works well for green salads

Ingredients:
Lemon juice from freshly-squeezed lemon (3 parts)
Extra virgin olive oil (1 part)
dash of sea salt
dash of black pepper
dash of italian herbs mix
a bit of sugar (to taste)

Mix all the ingredients together, making sure to stir well just before pouring so that the lemon juice and olive oil are thoroughly mixed (they will separate over time). Drizzle over salad greens (I usually buy the mixed salad bag and add kyuri/japanese cucumbers, sliced red onion, sliced carrots, rocket, croutons) and toss. It should taste something like vinaigrette dressing but not as sour, so remember to do a taste test before pouring the dressing.

How much is 1 part or a dash? Well that depends on how much salad you're making, as well as how much juice you squeeze out of each lemon. Don't make too much dressing or your salad will be too oily or too sour.

I made two large bowls of salad for a party recently, using 2 bags of mixed salad leaves, 3 kyuri, 1 carrot, 1 red onion (medium sized), and 1 bag of rocket. To make the dressing for these 2 bowls, I used 3 lemons. However, I ended up using only about 75% of the dressing.

The super quick salad dressing

Ingredients:
Lemon juice from freshly-squeezed lemon
dash of sea salt

If you forgot to buy ingredients or salad dressing and you find yourself in need of a quick fix, this is a very simple recipe that works with green salads (stick to the mixed salad bags, kyuri, carrots, don't use rocket). Put salad in bowl, squeeze lemon juice from lemon directly onto salad (how much depends on how much salad you're making - this dressing will be a little more sour than the first recipe above, so adjust accordingly). Sprinkle some sea salt over the leaves. Toss. You're done!

Tip to reduce pungency of onions (especially red onions)
If you find that red onions are too pungent for your salads/sandwiches/etc, try squeezing some lemon juice onto the sliced/diced onions and leaving the onions to marinate in the lemon juice for a few minutes. Then remove the lemon juice from the bowl of onions, and you can use the onions in your dishes. The pungent taste will be much reduced.