Whisk all ingredients together in a small bowl and toss with your favorite greens and toppings. We used mixed greens along with grilled chicken, thinly sliced apples, candied walnuts, and goat cheese - delicious!
Pro tip: If you're nearing the bottom of your favorite jar of jam, save a dish and simply add the mustard, lemon juice, and olive oil directly to the jar. Shake well and toss with greens.