Combine the vinegar, maple syrup, mustard, salt and pepper in a jar with a lid. Whisk or shake the lid till everything is well combined. Drizzle in the olive oil, whisking all the while. Taste and re-season as desired. Set aside till needed. If you made this the day before, bring it to room temperature and shake before using.
When the salmon and potatoes are almost finished baking, steam the beans:
Place 1 inch of water into a pot and add a steamer basket. Lay the beans into the basket and cover with a lid. Bring to a boil and steam for for 2 minutes or until crispy tender, crispy on the outside, tender on the inside.
Add the little gems lettuce leaves to a large platter or salad bowl. Drizzle with a few tablespoons of the vinaigrette. Toss to coat.
To make hard-boiled quail eggs:
Place the eggs you want to boil into a small pot and cover with cold water and 1/2 tsp of baking soda (the baking soda will help the shell separate from the egg). Bring to a boil over medium high heat. As soon as the water comes to a boil, put a lid on the pot and remove it from the heat. Let it sit for 6 minutes. Then drain the hot water and run the eggs under cold water for 30-40 seconds.
Place 5 or so eggs at a time in a small food storage container (not glass) with a lid. Pour about 2 tbsp of water over the eggs and put the lid on. Give the container a good few shakes. The water acts as a buffer as the eggs bump into each other and loosen the shells. Then one at a time, tap the wide part of the egg on the counter and start peeling. You will find that the shell starts to peel away quite easily. Repeat till you have all your eggs done.
To store the eggs in the fridge until use, or overnight, place them in a container with a lid and cover with cold water. Now they are ready to go into the fridge. The next day they will be fresh, hard boiled eggs!