1/4 cup balsamic vinegar
1/2 tsp kosher salt
1/2 tsp fresh black pepper
2 TB fresh marjoram or 1 TB dried
3/4 cup olive oil
Combine all but oil in food processor. Turn on and add oil slowly. Mix until emulsified (the oil and vinegar combine). Note: I've made this with white balsamic vinegar and it's really yummy. If you can find it, I recommend giving it a try. I got mine at Trader Joe's.