I just made one a couple days ago.
Basically it's:
3 TBS blood orange vinegar (balsamic works too but blood orange vinegar puts this over the top!)
1 TBS fresh lemon juice
1/4 cup evoo
1/2 tsp. Dijon mustard
drizzle (1/2 tsp or so) honey
1/2 tsp. finely chopped garlic
S&P to taste
My favorite way to serve this is with baby romaine, goat cheese, dried cranberries, and red onion.
Yes, you are right, this is very refreshing!
Another favorite with baby greens, strawberries, blueberries, red onion, goat cheese, and at the VERY end right before serving, some mint - use this for a dressing:
1/2 cup Chardonnay wine (DO NOT USE COOKING WINE)
1/3 cup white wine vinegar or some other mild vinegar like Champagne
2 TBS honey or more if needed - sometimes it takes 3 TBS depending on the honey
1 tsp. Dijon mustard
1/4 tsp. salt
1/8 tsp. ground black or white pepper
1 cup light-flavored olive oil (you want the wine to shine through here)