Cook ½ cup farro if you have not already. Simply boil it in water for about 20-25 minutes or until tender. Drain and set aside to cool off.
Preheat the oven to 400F convection or 425F regular bake. Line a baking sheet with parchment paper. Drizzle with the olive oil and use a pastry brush or your fingers to spread it around to coat the parchment.
Season the chicken all over with about 1 teaspoon salt (see note about chicken before seasoning).
In a large shallow bowl or plate, add crackers, cheese, oregano, garlic, pepper, and ½ teaspoon salt and toss to combine. Remove about ½ cup and set aside.
Add egg to another shallow bowl and whisk thoroughly. Dip the chicken in the egg (shake off any excess) and then into the cracker coating on each side so the chicken is well coated. You can use your hands to help evenly coat the chicken.
Transfer to the baking sheet and repeat with remaining chicken. If you run out of coating, add some of the reserved coating. Sprinkle some of the remaining coating on top of the chicken and press it in. Brush, drizzle, or spray the tops lightly with olive oil.
Bake for 20-30 minutes, or until the coating is dark golden brown and crispy.
To make the slaw, in a medium bowl, whisk together the tahini, lemon, fish sauce, garlic, salt, and pepper until combined. Add the water and whisk until smooth (it should be like a creamy sauce, if it’s too thick or pasty, stir in a splash of lemon or water). Add the veggies, farro, and herbs (if using) and toss to coat. Taste and season with more lemon or salt, if needed.
Serve the chicken topped with slaw, crunchy cracker topping (if using, see below), and squeeze lemon all over.