Martha's Vineyard Salad

Ingredients

• 1 cup white wine vinegar
• 1 cup red wine vinegar
• 1/2 cup raspberries (fresh or frozen)
• 1/2 cup olive oil
• 1/2 cup vegetable oil
• 1/2 cup maple syrup
• 2 tablespoons Dijon mustard
• 2 tablespoons dried tarragon leaves (or 4 tablespoons fresh)
• Dash of salt to taste
• 1 head Bibb lettuce, washed and dried
• 1/2 head red leaf lettuce, washed and dried
• 1/4 cup crumbled blue cheese
• 12 rings red onion, sliced 1/4-inch thick
• 3 tablespoons pine nuts, toasted