01 - Place the chopped cauliflower in a large pot. Cover with salted water and bring to a boil. Simmer until fork-tender, approximately 7 minutes.
02 - Drain the cauliflower using a colander and arrange in a single layer on a baking sheet to cool completely.
03 - Preheat oven to 375°F. Arrange halved grape tomatoes on a baking sheet, drizzle with olive oil, toss, and spread in an even layer. Sprinkle with salt and roast for 20 to 30 minutes, until tomatoes soften and begin to collapse. Remove and let cool.
04 - In a large skillet over medium heat, cook chopped bacon until crisp. Transfer to a paper towel-lined plate to drain. Reserve 2 tablespoons of the rendered bacon fat.
05 - Place sliced leeks in a large bowl filled with cold water and agitate to remove grit. Using a slotted spoon, lift leeks out and shake off excess water. Heat reserved bacon fat over medium heat and sauté leeks until translucent and tender. Set aside to cool.
06 - In a large mixing bowl, combine dill pickle relish, mustard, keto mayonnaise, pink salt, and cracked black pepper. Stir until smooth and set aside.
07 - In a large serving bowl, mix together cooled cauliflower, sliced green onions, crumbled bacon, sautéed leeks, and roasted tomatoes.
08 - Add the dressing to the salad and toss until all ingredients are evenly coated. Season with additional salt and black pepper to taste. Serve chilled or at room temperature.