To hard boil eggs: place eggs in small saucepan and cover with cool water. Over high heat, bring eggs to a rapid boil. As soon as the eggs boil, shut the heat off, cover the eggs, and set a timer for 12 minutes. Once cooked, remove from water and peel. Cool eggs before making recipe.
Slice eggs in half, lengthwise and remove yolks, placing them into a small bowl. Mash together with yogurt, sage, thyme, horseradish, and salt.
Fill the whites with the yolk mixture, top with a sprinkling of sage and tiny croutons. Serve chilled over mixed greens.
Notes
To make tiny croutons: slice bread into small squares and toss with olive oil. Toast in 350F oven until crispy.