Step 1

Preheat the oven to 350 degrees F.

Step 2

In a large saucepan, place 1 inch of water, add the carrots, and bring to a boil.

Step 3

Reduce the heat, cover and simmer, until the carrots are crisp and tender, about 7-10 minutes.

Step 4

Drain the water from the carrots, reserving 1/4 cup of the cooking liquid.

Step 5

Transfer the cooked carrots to a 1 1/2-quart baking dish.

Step 6

In a small bowl, combine the mayonnaise, the onion, the horseradish, and the reserved carrot water.

Step 7

Spread the mayonnaise mixture evenly over the carrots.

Step 8

Sprinkle the mayonnaise mixture with the cheese, then top with the crushed crackers.

Step 9

Bake, uncovered, until heated through and the cheese is melted, about 30 minutes.

Step 10

Serve.