1.
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In a medium bowl, whisk together the mustard and the vinegar. Slowly add both oils, while whisking, until incorporated. Add salt and pepper. Set aside at room temperature. |
2.
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Preheat oven to 400 degrees. Brush both sides of the onion slices with olive oil and season lightly with salt and pepper. Place on a rimmed baking sheet, in a single layer, and roast 15-20 minutes, turning once half way through. The onions should have caramelized brown edges and be very soft in the middle. Remove from baking sheet to a cutting board and let cool. When cool, cut into bite sized pieces. |
3.
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In a large bowl, toss both lettuces with the onions and toasted pine nuts. Drizzle with the Dijon balsamic dressing and toss again. Sprinkle with cheese shavings and serve. |