Preheat the oven to 425°F. Add the sweet potatoes to a large sheet pan and drizzle with 2 Tablespoons of olive oil and sprinkle with seasoning salt. Toss to coat. Bake in the preheated oven for 25 minutes, stirring halfway through, until the potatoes are fork-tender and crispy.
While they’re baking, grill the hamburgers. Form the ground beef into 6 (4-ounce) burger patties about 4 ½ inches in diameter and ¾ to 1 inch thick. Press your thumb into the center of each burger patty to form a small indent.
Preheat the grill to medium-high heat (400-425°F). Brush the grill grates clean and use tongs to wipe them down with a lightly oiled paper towel.
While it’s preheating, mix the seasonings together in a small bowl. Sprinkle both sides of the burger patties generously with seasoning.
Place the burgers on the hot grill grill with the lid closed for 4-5 minutes per side, or until the internal temperature reaches 160°F. Transfer the burgers to a clean plate or cutting board to rest while you assemble the burger bowls.
Divide the lettuce evenly between 4 bowls then top each with sliced avocado, sliced dill pickles, red onion, and sliced tomatoes. Top with the burger patty.
Mix together the sauce ingredient in a small bowl. Taste and season with salt as needed. Drizzle on top of the hamburger bowls before serving.