Heat your oven to 375°F and prepare a baking sheet with parchment paper or oil it well.
Combine the dijon mustard, olive oil, Greek yogurt, honey, apple cider vinegar, minced garlic, salt, and turmeric in a large mixing bowl and whisk until smooth.
Reserve about half of this honey mustard sauce in a separate container for later use.
To the remaining sauce in the bowl, beat in the egg thoroughly.
Cut the chicken breasts into bite-sized chunks and stir them into the egg and honey mustard mixture to coat; let this marinate briefly.
In another bowl, mix together tapioca starch, garlic powder, salt, pepper, and crushed pretzels.
Add the marinated chicken pieces to the pretzel coating mix and toss gently until all pieces are well covered.
Arrange the coated chicken bites on the prepared baking sheet in a single layer and lightly spray the tops with avocado oil.
Bake the chicken for 25 to 30 minutes, turning halfway through to ensure even crispiness.
While the chicken cooks, prepare the quick-pickled cucumbers by combining sliced cucumbers, apple cider vinegar, and salt in a bowl and stirring well; set aside.
Lightly sauté the corn in a skillet for a few minutes until warmed through.
Warm the cooked rice and divide it into four serving bowls.
Layer each bowl with the crispy chicken, sautéed corn, pickled cucumbers, halved cherry tomatoes, and optional slices of fresh avocado.
Finish by drizzling the reserved honey mustard sauce over each bowl and serve immediately.