Prep your base: Wash and chop your greens or cook your grain of choice. If using cauliflower rice, sauté it with a little oil and salt until tender, then set aside.
Make the special sauce: Stir together 1/2 cup Greek yogurt, 2 tablespoons light mayo, 1 tablespoon ketchup, 1 teaspoon mustard, 1 tablespoon pickle brine (or finely chopped pickles), a pinch of garlic powder, and 1–2 teaspoons apple cider vinegar.
Adjust salt and pepper to taste. Chill while you cook.
Cook the beef: Heat a large skillet over medium-high. Add 1 teaspoon oil, then the onion.
Cook 2–3 minutes until softened. Add garlic and cook 30 seconds.
Brown and season: Add the ground beef. Break it up with a spatula and cook until browned, about 6–8 minutes.
Drain excess fat if needed. Season with 3/4 teaspoon salt, 1/2 teaspoon black pepper, 1 teaspoon smoked paprika, 1/2 teaspoon onion powder, and a pinch of mustard powder. Stir to coat and cook 1 minute more.
Prep the toppings: Halve the tomatoes, slice the red onion, dice the avocado, and chop the pickles.
Shred the cheese if not pre-shredded.
Assemble the bowls: Add your base to each bowl. Top with a generous scoop of the seasoned beef. Add tomatoes, red onion, pickles, avocado, and a sprinkle of cheese.
Drizzle with the special sauce.
Finish and serve: Garnish with sesame seeds and fresh cracked pepper. Serve warm with extra sauce on the side.