– 2 egg yolks, room temperature – 2 garlic cloves, crushed – 3 teaspoons Dijon mustard, divided – 1 cup + 2 tablespoons olive oil, divided – 3 teaspoons lemon juice, divided – 1 cup grated carrot – 1 cup grated apple – 1 cup grated or finely sliced red cabbage – 4 tablespoons mayonnaise – 1 tablespoon apple cider vinegar – 1 teaspoon Dijon mustard – Salt and pepper, to taste – 1 pound portobello mushroom – ½ cup barbecue sauce – 4 hamburger buns or 8 pieces of sliced bread – 1 small gem lettuce
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