2 large russet (baking) potatoes (preferably organic; 3/4 pound each, scrubbed
3 tablespoons mayonnaise
1 tablespoon plus 1/2 teaspoon water, divided
3/4 teaspoon tomato paste
1/2 teaspoon anchovy paste
2 tablespoons Dijon mustard, divided
1/2 medium onion, finely chopped
1 tablespoon olive oil plus additional for coating potatoes
1/2 slice firm white sandwich bread
1 tablespoon milk
1/2 pound bulk breakfast sausage (1 cup) or 1/2 pound of breakfast sausage, casings removed
1 tablespoon chopped parsley
1/2 teaspoon fresh lemon juice
5 cups salad greens (2 ounces)(we used arugula, which paired with the dijon sauce was deliciously kicky)