Make the sauce. In a small bowl, mix 1/2 cup mayo, 2 tablespoons ketchup, 1 tablespoon yellow mustard, 1 tablespoon pickle relish, 1 teaspoon vinegar or brine, and a pinch of paprika. Taste and adjust salt, pepper, and sweetness.
Chill while you cook.
Prep the veggies. Chop lettuce, halve the tomatoes, thinly slice the red onion, and slice the pickles. Set aside. If using a carb base like rice or potatoes, have it warm and ready.
Season the chicken. In a bowl, combine ground chicken with 1 teaspoon salt, 1/2 teaspoon black pepper, 1 teaspoon garlic powder, 1 teaspoon onion powder, 1/2 teaspoon smoked paprika, and 1 to 2 teaspoons Worcestershire sauce.
Mix gently to avoid overworking.
Cook the chicken. Heat 1 tablespoon oil in a large skillet over medium-high heat. Add chicken and break it into crumbles. Cook 6–8 minutes, stirring occasionally, until browned and cooked through.
Add cheese. Reduce heat to low.
Sprinkle 1/2 to 3/4 cup shredded cheese over the hot chicken. Cover for 1 minute to melt, then gently fold it in.
Assemble the bowls. Divide lettuce (and optional rice/quinoa/potatoes) between bowls. Top with cheesy chicken, tomatoes, onions, and pickles.
Drizzle with the special sauce.
Finish and serve. Sprinkle sesame seeds and an extra crack of pepper. Serve immediately while the chicken is warm and the greens are crisp.