Season the walleye fillet with salt and pepper on all sides.
Heat a non-stick pan over medium heat. Add butter or cooking oil to coat the bottom of the pan once hot.
Sear the fish in the pan for about 2-3 minutes per side until golden brown, then remove it from the pan and set aside.
In the same pan, add minced garlic over medium heat until fragrant (1 minute).
Place the cooked walleye back into the pan with its juices. Squeeze fresh lemon wedges on top of each fillet.
Garnish with chopped fresh dill and serve immediately.