Place the chicken breast between parchment paper and pound to an even half-inch thickness.
Marinate the chicken in buttermilk for at least 15 minutes to tenderize.
In a shallow bowl, whisk together the flour, smoked paprika, garlic powder, onion powder, salt, and pepper.
Remove the chicken from the buttermilk, letting excess drip off, then dredge thoroughly in the flour mixture.
Heat avocado oil in a non-stick skillet over medium-high heat.
Cook the chicken for 4-5 minutes per side until the coating is golden-brown and crispy and the internal temperature reaches 165°F.
Toast the whole grain bun lightly in the same pan.
Spread Greek yogurt on the bottom bun, top with lettuce, the crispy chicken, and dill pickles.