I want to mention that the salad tastes best with a homemade vinaigrette but if your rushed on time or feeling lazy, just squirt a lemon on top and drizzle with olive oil s&p. It's still insanely good.
Red Wine Vinegar
Salt & Pepper
Dice the onions finely and place them in vinegar to soak. This softens there intense and harsh flavor. Dice the cucumber, avocado, and halve, or quarter the cherry tomatoes. You want the vegetables to be roughly the same size. Mince the fresh dill. Throw everything into a bowl and squeeze half a lemon on top to keep the avocado from browning. Whip up a vinaigrette by whisking a few teaspoons of vinegar and 1 tsp of mustard together. Continue whisking while you pour a slow stream of olive oil in (about 1/2 cup). Taste and adjust seasoning. Pour the vinaigrette over the salad and be dillighted! (ha ha sorry, I'm a sucker for cheesy jokes ;)